Keratin dyeing compounds, keratin dyeing compositions containing them, and use thereof

ABSTRACT

Bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms. Compositions for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and one or more bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms. A method for oxidative dyeing of keratin fibers, comprising applying such compositions in the presence of an oxidizing agent, for a period sufficient to develop the desired coloration.

CROSS REFERENCE TO RELATED APPLICATION

The application claims the benefit of provisional application No. 60/544,934 filed Feb. 13, 2004 (Case 9530P).

FIELD OF THE INVENTION

This invention relates to bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms, compositions for the oxidative dyeing of keratin fibers (preferably hair) comprising such compounds, and use thereof.

BACKGROUND OF THE INVENTION

The most extensively used method currently employed to color hair is by an oxidative process that utilizes one or more oxidative hair coloring agents in combination with one or more oxidizing agents.

Commonly, a peroxy oxidizing agent is used in combination with one or more developers or couplers, generally small molecules capable of diffusing into hair. In this procedure, a peroxide material, such as hydrogen peroxide, activates the developers so that they react with the couplers to form larger sized compounds in the hair shaft to give a variety of shades and colors.

A wide variety of developers and couplers have been employed in such oxidative hair coloring systems and compositions. However, there still exists a need for additional keratin dyeing compounds that can act as both developers and couplers that safely provide color benefits.

SUMMARY OF THE INVENTION

This invention relates to bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms according to the formulas defined herein. This invention also relates to a composition for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and one or more bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms heteroatoms. This invention further relates to a method for oxidative dyeing of keratin fibers, comprising applying such compositions in the presence of an oxidizing agent, for a period sufficient to develop the desired coloration. The keratin dyeing compounds of the present invention can act as a developer and/or a coupler.

It is to be understood that within the scope of this invention, numerous potentially and actually tautomeric compounds are involved. Thus, for example, 2-mercaptopyridine (I) exists under known conditions in the pyridine-2-thione tautomer form (II):

It is to be understood that when this development refers to a particular structure, all of the reasonable additional tautomeric structures are included. In the art, tautomeric structures are frequently represented by one single structure and the present invention follows this general practice.

DETAILED DESCRIPTION OF THE INVENTION

While the specification concludes with claims that particularly point out and distinctly claim the invention, it is believed the present invention will be better understood from the following description.

The present invention relates to bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms. The compounds of the present invention can act as both developers and/or couplers that safely provide color benefits.

Herein, “comprising” means that other steps and other ingredients which do not affect the end result can be added. This term encompasses the terms “consisting of” and “consisting essentially of”. The compounds/compositions and methods/processes of the present invention can comprise, consist of, and consist essentially of the essential elements and limitations of the invention described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.

All percentages, parts and ratios are based upon the total weight of the compositions of the present invention, unless otherwise specified. All such weights as they pertain to listed ingredients are based on the active level and, therefore, do not include solvents or by-products that may be included in commercially available materials, unless otherwise specified. The term “weight percent” may be denoted as “wt. %” herein.

Except as otherwise noted, all amounts including part, percentages, and proportions are understood to be modified by the word “about”, and amounts are not intended to indicate significant digits. Except as otherwise noted, the articles “a”, “an”, and “the” mean “one or more”.

As used herein, the term “keratin” refers to a scleroprotein found in epidermal tissues and modified into hard structures such as horns, hair, and nails. Thus, “keratinous fibers” refers to those found in hair, skin and nails and various animal body parts such as horns, hooves and feathers.

As used herein, the term “hair” refers to keratinous fibers on a living, e.g. a person, or non-living body, e.g. in a wig, hairpiece, or other aggregation of non-living keratinous fibers. Mammalian, preferably human, hair is a preferred. Notably, hair, wool, fur, and other keratinous fibers are suitable substrates for coloring by the compounds and compositions described herein.

As used herein, the term “keratin dyeing compounds” refers to compounds that may be used in the composition to act as developers, couplers, or both, in order to provide color to ketatinous fibers.

As used herein, the term “keratin dyeing composition” refers to the composition containing one or more keratin dyeing compounds, including the compounds described herein.

As used herein, “cosmetically acceptable” means that ingredients which the term describes are suitable for use in contact with the skin or hair of humans and lower animals without undue toxicity, incompatibility, instability, irritation, allergic response, and the like.

Keratin Dyeing Compounds

The inventive compounds are bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen according to the following formulas:

wherein Y is selected from the group consisting of S and O;

wherein R¹, R², R⁴, R⁵, and R⁶ are the same or different and are selected from the group consisting of:

-   -   (a) C-linked monovalent substituents selected from the group         consisting of:         -   (i) substituted or unsubstituted, straight or branched,             alkyl, mono- or poly-unsaturated alkyl, heteroalkyl,             aliphatic, heteroaliphatic, or heteroolefinic systems,         -   (ii) substituted or unsubstituted, mono- or poly-cyclic             aliphatic, aryl, or heterocyclic systems, and         -   (iii) substituted or unsubstituted, mono-, poly-, or             per-fluoro alkyl systems; wherein said systems of (i), (ii)             and (iii) comprise from about 1 to about 10 carbon atoms and             from about 0 to about 5 heteroatoms selected from the group             consisting of O, S, N, P, and Si;         -   wherein substituents of the substituted systems of the             C-linked monovalent substituents are selected from the group             consisting of amino, hydroxyl, alkylamino (linear or             branched C1–C5), dialkylamino (linear or branched C1–C5),             hydroxyalkylamino (linear or branched C1–C5),             dihydroxyalkylamino (linear or branched C1–C5), arylamino or             substituted arylamino (substituents are halogen, C1–C5             alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino), heteroarylamino or substituted heteroarylamino             (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy,             trifluoromethyl, amino, C1–C5 alkylamino), arylmethylamino             or substituted arylmethylamino (substituents are halogen,             C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino), and heteroarylmethylamino or substituted             heteroarylmethylamino (substituents are halogen, C1–C5             alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino),     -   (b) S-linked monovalent substituents selected from the group         consisting of SA¹, SO₂A¹, SO₃A¹, SSA¹, SOA¹, SO₂NA¹A², SNA¹A²,         and SONA¹A²;     -   (c) O-linked monovalent substituents selected from the group         consisting of OA¹, and ONA¹A²;     -   (d) N-linked monovalent substituents selected from the group         consisting of NA¹A², (NA¹A²A³)⁺, NA¹OA², NA¹SA², NO₂, N═NA¹,         N═NOA¹, NA¹CN, and NA¹NA²A³;     -   (e) monovalent substituents selected from the group consisting         of COOA¹, CONA¹ ₂, CONA¹COA², C(═NA¹)NA¹A², CN, and X;     -   (f) fluoroalkyl monovalent substituents selected from the group         consisting of mono-, poly-, and per-fluoro alkyl systems         comprising from about 1 to about 12 carbon atoms and from about         0 to about 4 heteroatoms; and     -   (g) hydrogen

wherein A¹, A², and A³ are monovalent and are independently selected from the group consisting of: H; substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems; substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems; and substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems, or A¹ and A² together with nitrogen atom to which they are bound form a ring; wherein said systems comprise from about 1 to about 10 carbon atoms and from about 0 to about 5 heteroatoms selected from the group consisting of O, S, N, P, and Si;

wherein X is a halogen selected from the group consisting of F, Cl, Br, and I.

In a preferred embodiment, R¹, R², R⁴, R⁵, and R⁶ are selected from the group consisting of a hydrogen atom; a halogen atom such as chlorine, bromine or fluorine; an amino substituent, a hydroxyl substituent; a cyano substituent; a C₁–C₄ alkyl substituent; a trifluoromethyl substituent, an alkylamino substituent (e.g., N,N-dimethylamino, N,N-diethylamino, N-methylamino, or N-ethylamino); a hydroxyalkylamino substituent (e.g., N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino or N,N-bis(hydroxypropyl)amino); an acetylamido substituent; a carboxyl substituent or its esters; an alkoxy substituent (e.g., methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, 2-cyanoethoxy, phenethyloxy, phenoxyethoxy, p-chlorobenzyloxy or methoxyethylcarbamoylmethoxy); an alkoxyalkyl substituent (e.g., methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl or ethoxypropyl); a carbamoyl substituent; an alkylcarbamoyl substituent (e.g., methylcarbamoyl, ethylcarbamoyl, dimethylcarbamoyl, or diethylcarbamoyl); a hydroxyalkylcarbamoyl substituent (e.g., 2-hydroxyethylcarbamoyl, bis(2-hdyroxyethyl)carbamoyl, hydroxymethylcarbamoyl, bis(hydroxymethyl)carbamoyl); an amido substituent; an alkylamido substituent (e.g., acetamido, propionamido, or butyramido); an alkylcarbonyl substituent (e.g., acetyl, butyryl, or propionyl), an alkoxycarbonyl substituent (e.g., methoxycarbonyl, ethoxycarbonyl, or propoxycarbonyl); an aryloxy substituent (e.g., phenoxy, 4-methoxyphenoxy, 4-nitrophenoxy, 4-cyanophenoxy, 4-methanesulfonamidophenoxy, 4-methanesulfonylphenoxy, 3-methylphenoxy or 1-naphthyloxy); an acyloxy substituent (e.g., acetoxy, propanoyloxy, benzolyloxy, 2,4-dichlorobenzolyloxy, ethoxyalkyloxy, pyruviloyloxy, cinnamoyloxy or myristoyloxy); an alkylthio substituent (e.g., methylthio, ethylthio, propylthio, butylthio, 2-cyanoethylthio, benzylthio, phenethylthio, 2-(diethylamino)ethylthio, ethoxyethylthio or phenoxyethylthio); an arylthio substituent (e.g., phenylthio, 4-carboxyphenylthio, 2-ethoxy-5-tert-butylphenylthio, 2-carboxyphenylthio or 4-methanesulfonylphenylthio); a heteroarylthio substituent (e.g., 5-phenyl-2,3,4,5-tetrazolyloxy or 2-benzothiazolyloxy); a heteroaryloxy substituent (e.g., 5-phenyl-2,3,4,5-tetrazolyloxy or 2-benzothiazolyloxy); a 3-, 4-, 5-, 6-, or 7-membered heterocycle having at least one nitrogen, oxygen or sulfur atom (e.g., pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, imidazolyl, thiadiazolyl, pyrollidine, piperidine, morpholine, piperazine, indoline, hexahydroazepine, aziridine, and azetidine) and being optionally substituted; an aryl substituent (e.g., phenyl or naphthyl) which is optionally substituted; a sulfonyl substituent; a sulfinyl substituent; a phosphonyl substituent; a sulfamoyl substituent; a siloxy substituent; an acyloxy substituent; a carbamoyloxy substituent; a sulphonamide substituent; an imide substituent; a ureido substituent; a sulfamoylamino substituent; an alkoxycarbonylamino substituent; an aryloxycarbonylamino substituent; an aryloxycarbonyl substituent; and a benzenesulfonamido substituent.

If the compound of the present invention is utilized as a developer, at least one of R¹, R⁴ or R⁶ is an amino group, with preferably at least one of the remaining R¹, R², R⁴, R⁵, and R⁶ being selected from substituents selected from the group consisting of Amino, hydroxyl, a 3-, 4-, 5-, 6-, or 7-membered heterocycle having at least one nitrogen, oxygen or sulfur atom (e.g., pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, imidazolyl, thiadiazolyl, pyrollidine, piperidine, morpholine, piperazine, indoline, hexahydroazepine, aziridine, and azetidine) and being optionally substituted, Alkylamino (linear, branched, or cyclic C1–C5), Dialkylamino (linear, branched, or cyclic C1–C5), Hydroxyalkylamino (linear, branched, or cyclic C1–C5), Dihydroxyalkylamino (linear, branched, or cyclic C1–C5), Arylamino or substituted arylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), Heteroarylamino or substituted heteroarylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), Arylmethylamino or substituted arylmethylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), and Heteroarylmethylamino or substituted heteroarylmethylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino).

If the compound of the present invention is utilized as a coupler, preferred substituents are selected from the group consisting of Amino, Hydroxyl, Alkylamino (linear or branched C1–C5), Hydroxyalkylamino (linear or branched C1–C5), Arylamino or substituted arylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), Heteroarylamino or substituted heteroarylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), Arylmethylamino or substituted arylmethylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino), and Heteroarylmethylamino or substituted heteroarylmethylamino (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5 alkylamino).

The developers and couplers of the present invention can also accommodate nucleofugic leaving groups selected from the group consisting of hydrogen, chlorine, cyano, alkoxy, phenoxy, methylsulfonyoxy, pyridone and pyridazone.

In a preferred embodiment, the couplers of the present invention are utilized in compositions together with suitable 5-membered ring developers chosen from the following classes: thiophenes, pyrroles, furans, pyrazoles, imidazoles, thiazoles, oxazoles, isothiazoles, or isoxazoles. In a more preferred embodiment, the couplers of the present invention are utilized in compositions together with with developers that are pyrazoles. In an even more preferred embodiment, the couplers of the present invention are utilized in compositions together with the following pyrazole developers: 1-methyl-1H-pyrazole-4,5-diamine, 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol, 1-isopropyl-1H-pyrazole-4,5-diamine, 1-(4-methylbenzyl)-1H-pyrazole-4,5-diamine, 1-(benzyl)-1H-pyrazole-4,5-diamine, 1-(4-chlorobenzyl)-1H-pyrazole-4,5-diamine and 1-Hydroxyethyl-4,5-diaminopyrazole sulphate. Even more preferably, the couplers of the present invention are utilized in compositions together with 1-methyl-1H-pyrazole-4,5-diamine; 1-Hydroxyethyl-4,5-diaminopyrazole sulphate; and 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol. While not being bound to theory, such combinations enable the achievement of desired more hypsochromic colors (e.g., yellow) relative to conventional combinations of developers and couplers.

In a further preferred embodiment, the couplers of the present invention have a computed apparent partition coefficient, Log D, at pH 10 of between −2.5 and 3.5, preferably between −1.5 and 3.0, more preferably between −0.5 and 2.5. Log D takes into account the extent of ionisation and can be computed via ACD/Labs 6.0 software available from Advanced Chemistry Development Inc. Copyright® 1994–2002.

The inventive compounds may be substituted pyrrolo[2,1-b]thiazoles or pyrrolo[2,1-b]oxazoles, pyrrolo[5,1-b]thiazoles or pyrrolo[5,1-b]oxazoles, imidazo[5,1-b]thiazoles or imidazo[5,1-b]oxazoles, imidazo[2,1-b]thiazoles or imidazo[2,1-b]oxazoles, pyrrolo[2,1-b][1,3,4]thiadiazoles or pyrrolo[2,1-b][1,3,4]oxadiazoles, pyrrolo[1,2-d][1,2,4]thiadiazoles or pyrrolo[1,2-d][1,2,4]oxadiazoles, thiazolo[3,2-e][1,2,3]triazoles or oxazolo[3,2-e][1,2,3]triazoles, thiazolo[3,2-b][1,2,4]triazoles or oxazolo[3,2-b][1,2,4]triazoles, thiazolo[2,3-c][1,2,4]triazoles or oxazolo[2,3-c][1,2,4]triazoles, pyrazolo[5,1-b][1,3,4]thiadiazoles or pyrazolo[5,1-b][1,3,4]oxadiazoles, imidazo[5,1-b][1,3,4]thiadiazoles or imidazo[5,1-b][1,3,4]oxadiazoles, imidazo[2,1-b][1,3,4]thiadiazoles or imidazo[2,1-b][1,3,4]oxadiazoles, or one of the corresponding addition salts with an acid.

Preferred developers and couplers include the following bicyclic heteroaromatic compounds having a ring junction nitrogen and incorporating thia or oxa heteroatoms:

(I) Pyrrolo[2,1-b]thiazoles and Pyrrolo[2,1-b]oxazoles

a. Preferred Developers

Preferred developers of formula I are selected from the group consisting of pyrrolo[2,1-b]thiazoles and pyrrolo[2,1-b]oxazoles according to the following formulas:

wherein Y is selected from the group consisting of S and O;

wherein D² and D⁵ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and

wherein E¹, E², E⁴, E⁵ and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.

Especially preferred developers of the present invention according to formulas Ia, Ib and Ic are selected from the group consisting of pyrrolo[2,1-b]thiazole-5,6-diamine, 5-aminopyrrolo[2,1-b]thiazol-6-ol, pyrrolo[2,1-b]thiazol-7-amine, pyrrolo[2,1-b]thiazole-2,3-diamine, pyrrolo[2,1-b]thiazol-5-amine, 3-aminopyrrolo[2,1-b]thiazol-2-ol, pyrrolo[2,1-b]oxazole-5,6-diamine, 5-aminopyrrolo[2,1-b]oxazol-6-ol, pyrrolo[2,1-b]oxazol-7-amine, pyrrolo[2,1-b]oxazole-2,3-diamine, pyrrolo[2,1-b]oxazol-5-amine, and 3-aminopyrrolo[2,1-b]oxazol-2-ol.

b. Preferred Couplers

Preferred couplers of formula I are selected from the group consisting of pyrrolo[2,1-b]thiazoles and pyrrolo[2,1-b]oxazoles according to the following formulas:

wherein Y, D², D⁵, E¹, E², E⁴, E⁵ and E⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas Id, Ie, and If are selected from the group consisting of pyrrolo[2,1-b]thiazol-6-amine, pyrrolo[2,1-b]thiazol-6-ol, 6-methylpyrrolo[2,1-b]thiazole, pyrrolo[2,1-b]thiazole-3,6-diamine, pyrrolo[2,1-b]thiazole-6,7-diamine, pyrrolo[2,1-b]thiazol-2-amine, pyrrolo[2,1-b]thiazol-2-ol, pyrrolo[2,1-b]oxazol-6-amine, pyrrolo[2,1-b]oxazol-6-ol, 6-methylpyrrolo[2,1-b]oxazole, pyrrolo[2,1-b]oxazole-3,6-diamine, pyrrolo[2,1-b]oxazole-6,7-diamine, pyrrolo[2,1-b]oxazol-2-amine, and pyrrolo[2,1-b]oxazol-2-ol.

(II) Pyrazolor[5,1-b]thiazoles and Pyrazolo[5,1-b]oxazoles

a. Preferred Developers

Preferred developers of formula II are selected from the group consisting of pyrazolo[5,1-b]thiazoles and pyrazolo[5,1-b]oxazoles according to the following formulas:

wherein Y, D², E¹, E², E⁴, and E⁵ are as defined above.

Especially preferred developers of the present invention according to formulas IIa and IIb are selected from the group consisting of pyrazolo[5,1-b]thiazol-7-amine, 6-methyl-pyrazolo-[5,1-b]thiazole-7-amine, pyrazolo[5,1-b]thiazole-6,7-diamine, 7-aminopyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-2,3-diamine, 3-aminopyrazolo[5,1-b]thiazol-2-ol, pyrazolo[5,1-b]oxazol-7-amine, pyrazolo[5,1-b]oxazole-6,7-diamine, 7-aminopyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-2,3-diamine, and 3-aminopyrazolo[5,1-b]oxazol-2-ol.

b. Preferred Couplers

Preferred couplers of formula II are selected from the group consisting of pyrazolo[5,1-b]thiazoles and pyrazolo[5,1-b]oxazoles according to the following formulas:

wherein Y, D², E¹, E², E⁴, and E⁵ are as defined above.

Especially preferred couplers of the present invention according to formulas IIc and IId are selected from the group consisting of pyrazolo[5,1-b]thiazol-6-amine, pyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-3,6-diamine, pyrazolo[5,1-b]thiazole-6,7-diamine, pyrazolo[5,1-b]thiazol-2-amine, pyrazolo[5,1-b]thiazol-2-ol, pyrazolo[5,1-b]oxazol-6-amine, pyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-3,6-diamine, pyrazolo[5,1-b]oxazole-6,7-diamine, pyrazolo[5,1-b]oxazol-2-amine, and pyrazolo[5,1-b]oxazol-2-ol.

(III) Imidazo[5,1-b]thiazoles and Imidazo[5,1-b]oxazoles

a. Preferred Developers

Preferred developers of formula III are selected from the group consisting of imidazo[5,1-b]thiazoles and imidazo[5,1-b]oxazoles according to the following formulas:

wherein Y, D², E¹, E², E⁴, and E⁶ are as defined above.

Especially preferred developers of the present invention according to formulas IIIa, IIIb, and IIIc are selected from the group consisting of imidazo[5,1-b]thiazole-7-amine, imidazo[5,1-b]thiazole-5,7-diamine, imidazo[5,1-b]thiazole-3,5,7-triamine, 5-aminoimidazo[5,1-b]thiazole-7-ol, imidazo[5,1-b]thiazole-7-amine, imidazo[5,1-b]thiazole-2,3-diamine, imidazo[5,1-b]thiazole-5-amine, 3-aminoimidazo[5,1-b]thiazole-2-ol, imidazo[5,1-b]oxazole-5,7-diamine, 5-aminoimidazo[5,1-b]oxazole-7-ol, imidazo[5,1-b]oxazole-7-amine, 2-methyl-imidazo[5,1-b]oxazole-7-amine, imidazo[5,1-b]oxazole-2,3-diamine, imidazo[5,1-b]oxazole-5-amine, and 3-aminoimidazo[5,1-b]oxazole-2-ol.

b. Preferred Couplers

Preferred couplers of formula III are selected from the group consisting of imidazo[5,1-b]thiazoles and imidazo[5,1-b]oxazoles according to the following formulas:

wherein Y, D², E¹, E², E⁴, and E⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas IIId, IIIe, and IIIf are selected from the group consisting of imidazo[5,1-b]thiazole-3,7-diamine, imidazo[5,1-b]thiazole-3,7-diol, imidazo[5,1-b]thiazole-3,5-diamine, imidazo[5,1-b]thiazole-2,7-diamine, imidazo[5,1-b]thiazole-2-amine, imidazo[5,1-b]thiazole-2-ol, imidazo[5,1-b]oxazole-3,7-diamine, imidazo[5,1-b]oxazole-3,7-diol, imidazo[5,1-b]oxazole-3,5-diamine, imidazo[5,1-b]oxazole-2,7-diamine, imidazo[5,1-b]oxazole-2-amine, and imidazo[5,1-b]oxazole-2-ol.

(IV) Imidazo[2,1-b]thiazoles and Imidazo[2,1-b]oxazoles

a. Preferred Developers

Preferred developers of formula IV are selected from the group consisting of imidazo[2,1-b]thiazoles and imidazo[2,1-b]oxazoles according to the following formulas:

wherein Y, D², D⁵, E¹, E², E⁵, and E⁶ are as defined above.

Especially preferred developers of the present invention according to formulas IVa and IVb are selected from the group consisting of imidazo[2,1-b]thiazole-5-amine, imidazo[2,1-b]thiazole-5,6-diamine, 5-amino imidazo[2,1-b]thiazole-6-ol, imidazo[2,1-b]thiazole-2,3-diamine, 3-amino imidazo[2,1-b]thiazole-2-ol, imidazo[2,1-b]oxazole-5-amine, imidazo[2,1-b]oxazole-5,6-diamine, 5-amino imidazo[2,1-b]oxazole-6-ol, imidazo[2,1-b]oxazole-2,3-diamine, and 3-amino imidazo[2,1-b]oxazole-2-ol.

b. Preferred Couplers

Preferred couplers of formula IV are selected from the group consisting of imidazo[2,1-b]thiazoles and imidazo[2,1-b]oxazoles according to the following formulas:

wherein Y, D², D⁵, E¹, E², E⁵, and E⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas IVc and IVd are selected from the group consisting of imidazo[2,1-b]thiazole-6-amine, imidazo[2,1-b]thiazole-6-ol, imidazo[2,1-b]thiazole-3,6-diamine, imidazo[2,1-b]thiazole-5,6-diamine, imidazo[2,1-b]thiazole-2-amine, imidazo[2,1-b]thiazole-2-ol, imidazo[2,1-b]oxazole-6-amine, imidazo[2,1-b]oxazole-6-ol, imidazo[2,1-b]oxazole-3,6-diamine, imidazo[2,1-b]oxazole-5,6-diamine, imidazo[2,1-b]oxazole-2-amine, and imidazo[2,1-b]oxazole-2-ol.

(V) Pyrrolo[2,1-b][1,3,4]thiadiazoles and Pyrrolo[2,1-b][1,3,4]oxadiazoles

a. Preferred Developers

Preferred developers of formula V are selected from the group consisting of pyrrolo[2,1-b][1,3,4]thiadiazoles and pyrrolo[2,1-b][1,3,4]oxadiazoles according to the following formulas:

wherein Y, D⁵, E², E⁴, E⁵, and E⁶ are as defined above.

Especially preferred developers of the present invention according to formulas Va and Vb are selected from the group consisting of pyrrolo[2,1-b][1,3,4]thiadiazole-7-amine, pyrrolo[2,1-b][1,3,4]thiadiazole-5-amine, pyrrolo[2,1-b][1,3,4]thiadiazole-5,6-diamine, 5-aminopyrrolo[2,1-b][1,3,4]thiadiazole-6-ol, pyrrolo[2,1-b][1,3,4]thiadiazole-6,7-diamine, 5-aminopyrrolo[2,1-b][1,3,4]thiadiazole-2-ol, pyrrolo[2,1-b][1,3,4]oxadiazole-7-amine, pyrrolo[2,1-b][1,3,4]oxadiazole-5-amine, pyrrolo[2,1-b][1,3,4]oxadiazole-5,6-diamine, 5-aminopyrrolo[2,1-b][1,3,4]oxadiazole-6-ol, pyrrolo[2,1-b][1,3,4]oxadiazole-6,7-diamine, and 5-aminopyrrolo[2,1-b][1,3,4]oxadiazole-2-ol.

b. Preferred Couplers

Preferred couplers of formula V are selected from the group consisting of pyrrolo[2,1-b][1,3,4]thiadiazoles and pyrrolo[2,1-b][1,3,4]oxadiazoles according to the following formulas:

wherein Y, D⁵, E², E⁴, E⁵, and E⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas Vc and Vd are selected from the group consisting of pyrazolo[5,1-b]thiazol-6-amine, pyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-2,6-diamine, pyrazolo[5,1-b]thiazole-2,6-diol, pyrazolo[5,1-b]thiazol-2,7-diol, pyrazolo[5,1-b]oxazol-6-amine, pyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-2,6-diamine, pyrazolo[5,1-b]oxazole-2,6-diol, and pyrazolo[5,1-b]oxazol-2,7-diol.

(VI) Pyrrolo[1,2-d][1,2,4]thiadiazoles and Pyrrolo[1,2-d][1,2,4]oxadiazoles

a. Preferred Developers

Preferred developers of formula VI are selected from the group consisting of pyrrolo[1,2-d][1,2,4]thiadiazoles and pyrrolo[1,2-d][1,2,4]oxadiazoles according to the following formulas:

wherein Y, D⁵, E¹, E⁴, E⁵, and E⁶ are as defined above.

Especially preferred developers of the present invention according to formulas VIa, VIb, and VIc are selected from the group consisting of pyrrolo[1,2-d][1,2,4]thiadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-3,5,6-triamine, 5-aminopyrrolo[1,2-d][1,2,4]thiadiazole-6-ol, pyrrolo[1,2-d][1,2,4]thiadiazole-pyrrolo[1,2,-d][1,2,4]thiadiazole-7-amine, pyrrolo 1,2-d][1,2,4]thiadiazole-5-amine, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diamine, 5-aminopyrrolo[1,2-d][1,2,4]thiadiazole-7-ol, pyrrolo[1,2-d][1,2,4]thiadiazole-3,6,7-triol, pyrrolo[1,2-d][1,2,4]oxadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-3,5,6-triamine, 5-aminopyrrolo[1,2-d][1,2,4]oxadiazole-6-ol, pyrrolo[1,2-d][1,2,4]oxadiazole-7-amine, pyrrolo[1,2-d][1,2,4]oxadiazole-5-amine, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diamine, 5-aminopyrrolo[1,2-d][1,2,4]oxadiazole-7-ol, and pyrrolo[1,2-d][1,2,4]oxadiazole-3,6,7-triol.

b. Preferred Couplers

Preferred couplers of formula VI are selected from the group consisting of pyrrolo[1,2-d][1,2,4]thiadiazoles and pyrrolo[1,2-d][1,2,4]oxadiazoles according to the following formulas:

wherein Y, D⁵, E¹, E⁴, E⁵, and E⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas VId, VIe and VIf are selected from the group consisting of pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diol, pyrrolo[1,2-d][1,2,4]thiadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-6-amine, pyrrolo[1,2-d][1,2,4]thiadiazole-6-ol, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diol, pyrrolo[1,2-d][1,2,4]oxadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-6-amine, and pyrrolo[1,2-d][1,2,4]oxadiazole-6-ol, 2-ol.

(VII) Thiazolo[3,2-e][1,2,3]triazoles and Oxazolo[3,2-e][1,2,3]triazoles

a. Preferred Developers

Preferred developers of formula VII are selected from the group consisting of thiazolo[3,2-e][1,2,3]triazoles and oxazolo[3,2-e][1,2,3]triazoles relating according to the following formulas:

wherein Y, D¹, D², and D⁴ are as defined above.

Especially preferred developers of the present invention according to formulas VIIa and VIIb are selected from the group consisting of thiazolo[3,2-e][1,2,3]triazole-7-amine, thiazolo[3,2-e][1,2,3]triazole-2,3,7-triamine, 7-aminothiazolo[3,2-e][1,2,3]triazole-2,3-diol, 3,7-diaminothiazolo[3,2-e][1,2,3]triazole-2-ol, 2,3-diaminothiazolo[3,2-e][1,2,3]triazole-7-ol, 3,7-triaminothiazolo[3,2-e][1,2,3]triazole-2-ol, oxazolo[3,2-e][1,2,3]triazole-7-amine, oxazolo[3,2-e][1,2,3]triazole-2,3,7-triamine, 7-aminooxazolo[3,2-e][1,2,3]triazole-2,3-diol, 3,7-diaminooxazolo[3,2-e][1,2,3]triazole-2-ol, 2,3-diaminooxazolo[3,2-e][1,2,3]triazole-7-ol, and 3,7-triaminooxazolo[3,2-e][1,2,3]triazole-2-ol.

c. Preferred Couplers

Preferred couplers of formula VII are selected from the group consisting of thiazolo[3,2-e][1,2,3]triazoles and oxazolo[3,2-e][1,2,3]triazoles according to the following formulas:

wherein Y, D¹, D², and D⁴ are as defined above.

Especially preferred couplers of the present invention according to formulas VIIc and VIId are selected from the group consisting of thiazolo[3,2-e][1,2,3]triazole-2,3-diamine, thiazolo[3,2-e][1,2,3]triazole-2,3-diol, thiazolo[3,2-e][1,2,3]triazole-2,7-diamine, 2-aminothiazolo[3,2-e][1,2,3]triazole-7-ol, 7-aminothiazolo[3,2-e][1,2,3]triazole-2-ol, oxazolo[3,2-e][1,2,3]triazole-2,3-diamine, oxazolo[3,2-e][1,2,3]triazole-2,3-diol, oxazolo[3,2-e][1,2,3]triazole-2,7-diamine, 2-aminooxazolo[3,2-e][1,2,3]triazole-7-ol, and 7-aminooxazolo[3,2-e][1,2,3]triazole-2-ol.

(VIII) Thiazolo[3,2-b][1,2,4]triazoles and Oxazolo[3,2-b][1,2,4]triazoles

a. Preferred Developers

Preferred developers of formula VIII are selected from the group consisting of thiazolo[3,2-b][1,2,4]triazoles and oxazolo[3,2-b][1,2,4]triazoles according to the following formula:

wherein Y, D² and D⁵ are as defined above.

Especially preferred developers of the present invention according to formula VIIIa are selected from the group consisting of thiazolo[3,2-b][1,2,4]triazole-2,3,6-triamine, 3-aminothiazolo[3,2-b][1,2,4]triazole-2,6-diol, 2,3-diaminothiazolo[3,2-b][1,2,4]triazole-6-ol, oxazolo[3,2-b][1,2,4]triazole-2,3,6-triamine, 3-aminooxazolo[3,2-b][1,2,4]triazole-2,6-diol, and 2,3-diaminooxazolo[3,2-b][1,2,4]triazole-6-ol.

b. Preferred Couplers

Preferred couplers of formula VIII are selected from the group consisting of thiazolo[3,2-b][1,2,4]triazoles and oxazolo[3,2-b][1,2,4]triazoles according to the following formula:

wherein Y, D² and D⁵ are as defined above.

Especially preferred couplers of the present invention according to formula VIIIb are selected from the group consisting of thiazolo[3,2-b][1,2,4]triazole-2,6-diamine, thiazolo[3,2-b][1,2,4]triazole-2,6-diol, 2-aminothiazolo[3,2-b][1,2,4]triazole-6-ol, 6-aminothiazolo[3,2-b][1,2,4]triazole-2-ol, oxazolo[3,2-b][1,2,4]triazole-2,6-diamine, oxazolo[3,2-b][1,2,4]triazole-2,6-diol, 2-aminooxazolo[3,2-b][1,2,4]triazole-6-ol, and 6-aminooxazolo[3,2-b][1,2,4]triazole-2-ol.

(IX) Thiazolo[2,3-c][1,2,4]triazoles and Oxazolo[2,3-c][1,2,4]triazoles

a. Preferred Developers

Preferred developers of formula IX are selected from the group consisting of thiazolo[2,3-c][1,2,4]triazoles and oxazolo[2,3-c][1,2,4]triazoles according to the following formulas:

wherein Y, D¹, D², and D⁶ are as defined above.

Especially preferred developers of the present invention according to formulas IXa and IXb are selected from the group consisting of thiazolo[2,3-c][1,2,4]triazole-5-amine, thiazolo[2,3-c][1,2,4]triazole-2,3,5-triamine, 3-aminothiazolo[2,3-c][1,2,4]triazole-2,5-diol, 2,5-diaminothiazolo[2,3-c][1,2,4]triazole-3-ol, 5-aminothiazolo[2,3-c][1,2,4]triazole-2,3-diol, 3,5-diaminothiazolo[2,3-c][1,2,4]triazole-2-ol, oxazolo[2,3-c][1,2,4]triazole-5-amine, oxazolo[2,3-c][1,2,4]triazole-2,3,5-triamine, 3-aminooxazolo[2,3-c][1,2,4]triazole-2,5-diol, 2,5-diaminooxazolo[2,3-c][1,2,4]triazole-3-ol, 5-aminooxazolo[2,3-c][1,2,4]triazole-2,3-diol, and 3,5-diaminooxazolo[2,3-c][1,2,4]triazole-2-ol.

b. Preferred Couplers

Preferred couplers of formula IX are selected from the group consisting of thiazolo[2,3-c][1,2,4]triazoles and oxazolo[2,3-c][1,2,4]triazoles according to the following formulas:

wherein Y, D¹, D², and D⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas IXc and IXd are selected from the group consisting of thiazolo[2,3-c][1,2,4]triazole-2,3-diamine, thiazolo[2,3-c][1,2,4]triazole-2,3-diol, thiazolo[2,3-c][1,2,4]triazole-2,5-diol, thiazolo[2,3-c][1,2,4]triazole-2,5-diamine, oxazolo[2,3-c][1,2,4]triazole-2,3-diamine, oxazolo[2,3-c][1,2,4]triazole-2,3-diol, oxazolo[2,3-c][1,2,4]triazole-2,5-diol, and oxazolo[2,3-c][1,2,4]triazole-2,5-diamine.

(X) Pyrazolo[5,1-b][1,3,4]thiadiazoles and Pyrazolo[5,1-b][1,3,4]oxadiazoles

a. Preferred Developers

Preferred developers of formula X are selected from the group consisting of pyrazolo[5,1-b][1,3,4]thiadiazoles and pyrazolo[5,1-b][1,3,4]oxadiazoles according to the following formula:

wherein Y, D² and D⁵ are as defined above.

Especially preferred developers of the present invention according to formula Xa are selected from the group consisting of pyrazolo[5,1-b][1,3,4]thiadiazole-7-amine, pyrazolo[5,1-b][1,3,4]thiadiazole-2,6,7-triamine, 7-aminopyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diol, 6,7-diaminopyrazolo[5,1-b][1,3,4]thiadiazole-2-ol, 2,7-diaminopyrazolo[5,1-b][1,3,4]thiadiazole-6-ol, pyrazolo[5,1-b][1,3,4]oxadiazole-7-amine, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6,7-triamine, 7-aminopyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diol, 6,7-diaminopyrazolo[5,1-b][1,3,4]oxadiazole-2-ol, and 2,7-diaminopyrazolo[5,1-b][1,3,4]oxadiazole-6-ol.

b. Preferred Couplers

Preferred couplers of formula X are selected from the group consisting of pyrazolo[5,1-b][1,3,4]thiadiazoles and pyrazolo[5,1-b][1,3,4]oxadiazoles according to the following formula:

wherein Y, D² and D⁵ are as defined above.

Especially preferred couplers of the present invention according to formula Xb are selected from the group consisting of pyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diamine, pyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diol, 2-aminopyrazolo[5,1-b][1,3,4]thiadiazole-6-ol, 6-aminopyrazolo[5,1-b][1,3,4]thiadiazole-2-ol, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diamine, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diol, 2-aminopyrazolo[5,1-b][1,3,4]oxadiazole-6-ol, and 6-aminopyrazolo[5,1-b][1,3,4]oxadiazole-2-ol.

(XI) Imidazo[5,1-b][1,3,4]thiadiazoles and Imidazo[5,1-b][1,3,4]oxadiazoles

a. Preferred Developers

Preferred developers of formula XI are selected from the group consisting of imidazo[5,1-b][1,3,4]thiadiazoles and imidazo[5,1-b][1,3,4]oxadiazoles according to the following formulas:

wherein Y, D², D⁴, and D⁶ are as defined above.

Especially preferred developers of the present invention according to formulas XIa and XIb are selected from the group consisting of imidazo[5,1-b][1,3,4]thiadiazole-7-amine, imidazo[5,1-b][1,3,4]thiadiazole-2,5,7-triamine, 7-aminoimidazo[5,1-b][1,3,4]thiadiazole-2,5-diol, 2,7-diaminoimidazo[5,1-b][1,3,4]thiadiazole-5-aminoimidazo[5,1-b][1,3,4]thiadiazole-2,7-diol, 2,5-diaminoimidazo[5,1-b][1,3,4]thiadiazole-7-ol, imidazo[5,1-b][1,3,4]oxadiazole-7-amine, imidazo[5,1-b][1,3,4]oxadiazole-2,5,7-triamine, 7-aminoimidazo[5,1-b][1,3,4]oxadiazole-2,5-diol, 2,7-diaminoimidazo[5,1-b][1,3,4]oxadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]oxadiazole-2,7-diol, and 2,5-diaminoimidazo[5,1-b][1,3,4]oxadiazole-7-ol.

b. Preferred Couplers

Preferred couplers of formula XI are selected from the group consisting of imidazo[5,1-b][1,3,4]thiadiazoles and imidazo[5,1-b][1,3,4]oxadiazoles according to the following formulas:

wherein Y, D²m D⁴, and D⁶ are as defined above.

Especially preferred couplers of the present invention according to formulas XIc and XId are selected from the group consisting of imidazo[5,1-b][1,3,4]thiadiazole-2,5-diamine, imidazo[5,1-b][1,3,4]thiadiazole-2,5-diol, 2-aminoimidazo[5,1-b][1,3,4]thiadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]thiadiazole-2-ol, imidazo[5,1-b][1,3,4]thiadiazole-2,7-diamine, imidazo[5,1-b][1,3,4]thiadiazole-2,7-diol, 2-aminoimidazo[5,1-b][1,3,4]thiadiazole-7-ol, 7-aminoimidazo[5,1-b][1,3,4]thiadiazole-2-ol, imidazo[5,1-b][1,3,4]oxadiazole-2,5-diamine, imidazo[5,1-b][1,3,4]oxadiazole-2,5-diol, 2-aminoimidazo[5,1-b][1,3,4]oxadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]oxadiazole-2-ol, imidazo[5,1-b][1,3,4]oxadiazole-2,7-diamine, imidazo[5,1-b][1,3,4]oxadiazole-2,7-diol, 2-aminoimidazo[5,1-b][1,3,4]oxadiazole-7-ol, and 7-aminoimidazo[5,1-b][1,3,4]oxadiazole-2-ol.

(XII) Imidazo[2,1-b][1,3,4]thiadiazoles and Imidazo[2,1-b][1,3,4]oxadiazoles

a. Preferred Developers

Preferred developers of formula XII are selected from the group consisting of imidazo[2,1-b][1,3,4]thiadiazoles and imidazo[2,1-b][1,3,4]oxadiazoles according to the following formula:

wherein Y, D² and D⁶ are as defined above.

Especially preferred developers of the present invention according to formula XIIa are selected from the group consisting of imidazo[2,1-b][1,3,4]thiadiazole-5-amine, imidazo[2,1-b][1,3,4]thiadiazole-2,5,6-triamine, 5,6-diaminoimidazo[2,1-b][1,3,4]thiadiazole-2-ol, 5-aminoimidazo[2,1-b][1,3,4]thiadiazole-2,6-diol, 2,5-diaminoimidazo[2,1-b][1,3,4]thiadiazole-6-ol, imidazo[2,1-b][1,3,4]oxadiazole-5-amine, imidazo[2,1-b][1,3,4]oxadiazole-2,5,6-triamine, 5,6-diaminoimidazo[2,1-b][1,3,4]oxadiazole-2-ol, 5-aminoimidazo[2,1-b][1,3,4]oxadiazole-2,6-diol, and 2,5-diaminoimidazo[2,1-b][1,3,4]oxadiazole-6-ol.

b. Preferred Couplers

Preferred couplers of formula XII are selected from the group consisting of imidazo[2,1-b][1,3,4]thiadiazoles and imidazo[2,1-b][1,3,4]oxadiazoles according to the following formula:

wherein Y, D² and D⁶ are as defined above.

Especially preferred couplers of the present invention according to formula XIIb are selected from the group consisting of imidazo[2,1-b][1,3,4]thiadiazole-2,6-diamine, imidazo[2,1-b][1,3,4]thiadiazole-2,6-diol, 2-aminoimidazo[2,1-b][1,3,4]thiadiazole-6-ol, 6-aminoimidazo[2,1-b][1,3,4]thiadiazole-2-ol, imidazo[2,1-b][1,3,4]oxadiazole-2,6-diamine, imidazo[2,1-b][1,3,4]oxadiazole-2,6-diol, 2-aminoimidazo[2,1-b][1,3,4]oxadiazole-6-ol, and 6-aminoimidazo[2,1-b][1,3,4]oxadiazole-2-ol.

Synthesis Examples

The following are non-limiting synthesis examples of the present invention.

EXAMPLE A Pyrrolo[2,1-b][1,3]thiazole-3,6-diamine, Obtainable from the Following Synthesis Strategy

Reaction of glycine ethyl ester hydrochloride (CAS 623-33-6) with thiophosgene (CAS 463-71-8) gives isothiocyanate 1 (J. Amer. Chem. Soc., 1916, 38, 1556). Condensation of isothiocyanate 1 with ethyl cyanoacetate (CAS 105-56-6) and sulfur leads to thiazolothione derivative 2 (Monatsch. Chem., 1981, 112, 1393). Further condensation of compound 2 with ethyl cyanoacetate (CAS 105-56-6) affords bicycle 3 (Monatsch. Chem., 1981, 112, 1393). Hydrolysis of tris ester 3 with hydrochloric acid gives tris acid 4. Decarboxylation of acid 4 leads to pyrrolo[2,1-b][1,3]thiazole-3,6-diamine 15A-4.

EXAMPLE B Pyrrolo[2,1-b][1,3]thiazol-5-amine, Obtainable from the Following Synthesis Strategy

Reaction of pyrrole (CAS 109-97-7) with 1,2-dichloroethylene (CAS 540-59-0) gives 1-ethynyl-1H-pyrrole 1 (Zh. Org. Khim., 1994, 30, 314). Reaction of 1-ethynyl-1H-pyrrole 1 with butyl lithium and sulfur gives pyrrolo[2,1-b][1,3]thiazole 2 (J. Organomet. Chem., 1995, 493, 271). Nitrosation of pyrrolo[2,1-b][1,3]thiazole 2 with sodium nitrite affords to nitroso compound 3 (see similar procedure in J. Chem. Soc., C, 1966, 1908). Reduction of nitroso compound 3 with hydrogen and palladium leads to pyrrolo[2,1-b][1,3]thiazol-5-amine 15A-5.

EXAMPLE C Imidazo[2,1-b][1,3]thiazol-6-amine, Obtainable from the Following Synthesis Strategy

Condensation of 2-aminothiazole (CAS 96-50-4) with ethyl bromopyruvate (CAS 70-23-5) gives bicycle 1 (Farmaco Ed. Sci., 1977, 32, 735). Hydrolysis of ester 1 with potassium hydroxide leads to corresponding acid 2 (Farmaco Ed. Sci., 1977, 32, 735). Treatment of acid 2 with diphenylphosphoryl azide (CAS 26386-88-9) in the presence of tert-butanol gives carbamate 3 (J. Med. Chem., 1991, 34, 1594). Hydrolysis of carbamate 3 with hydrochloric acid provides imidazo[2,1-b][1,3]thiazol-6-amine 15B-1 (Tetr. Lett, 1999, 40, 721).

EXAMPLE D Imidazo[2,1-b][1,3]thiazole-5,6-diamine, Obtainable from the Following Synthesis Strategy

Reaction of 2-aminothiazole (CAS 96-50-4) with chloroacetic acid (CAS 79-11-8) gives compound 1 (see Interim Report for Protocols 2 and 5 from 6.11.03). Cyclization of compound 1 with phosphorus oxychloride (CAS 10025-87-3) gives bicycle 2 (see Interim Report for Protocols 2 and 5 from 6.11.03). Nitration of bicycle 2 with nitric acid and acetic anhydride leads to nitro derivative 3 (Pharm. Acta Helv., 1993, 68, 21). Substitution of activated chloro atom in compound 3 with 4-aminomethanesulfonanilide, pyridine affords amino compound 4 (Pharm. Acta Helv., 1993, 68, 21). Reduction of compound 4 with hydrogen and palladium gives imidazo[2,1-b][1,3]thiazole-5,6-diamine 15B-4.

EXAMPLE E 5-aminoimidazo[2,1-b][1,3]thiazol-6-ol, Obtainable from the Following Synthesis Strategy

Reaction of 2-aminothiazole (CAS 96-50-4) with chloroacetic acid (CAS 79-11-8) gives compound 1 (see Interim Report for Protocols 2 and 5 from 6.11.03). Cyclization of compound 1 with phosphorus oxychloride (CAS 10025-87-3) gives bicycle 2 (see Interim Report for Protocols 2 and 5 from 6.11.03). Nitration of bicycle 2 with nitric acid and acetic anhydride leads to nitro derivative 3 (Pharm. Acta Helv., 1993, 68, 21). Substitution of activated chloro atom in compound 3 with sodium hydroxide affords hydroxy compound 4. Reduction of compound 4 with hydrogen and palladium gives 5-aminoimidazo[2,1-b][1,3]thiazol-6-ol 15B-5.

EXAMPLE F Imidazo[5,1-b][1,3]thiazol-7-amine, Obtainable from the Following Synthesis Strategy

Bromination of imidazole (CAS 288-32-4) with bromine gives 4,5-dibromoimidazole 1 (J. Chem. Soc., 1922, 952). Reduction of compound 1 with sodium sulfite leads to 4-bromoimidazole 2 (J. Chem. Soc., 1922, 952). Nitration of compound 2 with a mixture of nitric and sulfuric acid affords compound 3 (J. Chem. Soc., 1922, 952). Reaction of compound 3 with a mixture of hydrogen sulfide and ammonia in water gives compound 4 (J. Amer. Chem. Soc., 1957, 79, 2188). Reaction of compound 4 with chloroacetaldehyde (CAS 107-20-0) leads to compound 5 (Khim. Geterotsikl. Soedin., 1965, 313). Cyclisation of this compound with phosphorus oxychloride affords compound 6 (Khim. Geterotsikl. Soedin., 1967, 93). Reduction of compound 6 with hydrogen under palladium affords imidazo[5,1-b][1,3]thiazol-7-amine 3-1-1.

EXAMPLE G Imidazo[5,1-b][1,3]oxazol-7-amine, Obtainable from the Following Synthesis Strategy

Bromination of 2-methylimidazole (CAS 693-98-1) with bromine gives imidazole 1 (J. Chem. Soc., 1922, 2628). Reduction of compound 1 with sodium sulfite leads to imidazole 2 (J. Chem. Soc., 1922, 2628). Nitration of compound 2 with a mixture of nitric and sulfuric acid affords compound 3 (J. Chem. Soc., 1922, 2628). Reaction of compound 3 with chloroacetaldehyde (CAS 107-20-0) leads to compound 4 (see similar procedure in Khim. Geterotsikl. Soedin., 1981, 833). Cyclization of compound 4 with potassium tert-butoxide gives compound 5 (see similar procedure in Heterocycles, 1999, 50, 1081). Reduction of compound 6 with hydrogen under palladium affords compound imidazo[5,1-b][1,3]oxazol-7-amine 3-2-3.

EXAMPLE H Imidazo[2,1-b][1,3,4]thiadiazol-6-amine, Obtainable from the Following Synthesis Strategy

Reaction of chloroacetyl chloride (CAS 79-04-9) with methyl carbamate (CAS 598-55-0) gives compound 1 (J. Chem. Soc., 1960, 983). Reaction of compound 1 with 2-amino-1,3,4-thiadiazole (CAS 4005-51-0) leads to compound 2 (Farmaco Ed. Sci., 1985, 40, 34). Reaction of compound 2 with polyphosphoric acid affords compound 3 (Farmaco Ed. Sci., 1985, 40, 34). Hydrolysis of carbamate 3 with hydrochloric acid provides imidazo[2,1-b][1,3,4]thiadiazol-6-amine 12-1-4.

EXAMPLE I 2,3,6-trimethylpyrrolo[2,1-b]thiazol-5-ol, Obtainable from the Following Synthesis Strategy

Reaction of aminoacetonitrile hydrochloride (CAS 6011-14-9) with benzoyl chloride (CAS 98-88-4) gives compound 1 (J. Org. Chem., 1996, 61, 778). Reaction of compound 1 with hydrogen sulfide and ammonia leads to thioamide 2 (Am. Chem. J., 1912, 47, 239). Condensation of thioamide 2 with 3-bromo-2-butanone (CAS 814-75-5) affords thiazole 3 (Lieb. Ann., 1964, 676, 141). Cyclization of thiazole 3 with bromoacetone (can be obtained by bromination of acetone with bromine (Org. Synth., 1930, 10, 12)) gives bicycle 4 (Lieb. Ann., 1964, 676, 141). Hydrolysis of bicycle 4 with hydrochloric acid can produce hydroxy compound 15A-3 (see similar procedure in Lieb. Ann., 1964, 676, 141).

EXAMPLE J 6-Methyl-pyrazolo[5,1-b]thiazole-7-amine 7, Obtainable from the Following Synthesis Strategy

Treatment of 2-mesitylsulfonyl chloride (CAS 773-64-8) with tert-butyl N-hydroxycarbamate (CAS 36016-38-3) leads to compound 1 (Synthesis, 1972, 140). Hydrolysis of compound 1 with trifluoroacetic acid gives compound 2 (Synthesis, 1972, 140). Obtain compound 3 by the reaction of chloroacetaldehyde (CAS 107-20-0) with thioacetamide (CAS 62-55-5) (Lieb. Ann., 1889, 250, 269). Amination of compound 3 with compound 2 leads to salt 4 (Synthesis, 1974, 126). Condensation of compound 4 with acetic anhydride affords bicycle 5 (Chem. Pharm. Bull., 1974, 22, 482). Nitrosation of compound 5 with sodium nitrite and hydrochloric acid gives compound 6 (Chem. Pharm. Bull., 1974, 22, 482). Reduction of compound 6 with hydrogen under palladium affords 6-methylpyrazolo[5,1-b][1,3]thiazol-7-amine 7.

EXAMPLE K Imidazo[5,1-b]thiazole-7-amine 7, Obtainable from the Following Synthesis Strategy

Bromination of imidazole (CAS 288-32-4) with bromine gives 4,5-dibromoimidazole 1 (J. Chem. Soc., 1922, 952). Reduction of compound 1 with sodium sulfite leads to 4-bromoimidazole 2 (J. Chem. Soc., 1922, 952). Nitration of compound 2 with a mixture of nitric and sulfuric acid affords compound 3 (J. Chem. Soc., 1922, 952). Reaction of compound 3 with a mixture of hydrogen sulfide and ammonia in water gives compound 4 (J. Amer. Chem. Soc., 1957, 79, 2188). Reaction of compound 4 with chloroacetaldehyde (CAS 107-20-0) leads to compound 5 (Khim. Geterotsikl. Soedin., 1965, 313). Cyclisation of this compound with phosphorus oxychloride affords compound 6 (Khim. Geterotsikl. Soedin., 1967, 93). Reduction of compound 6 with hydrogen under palladium affords imidazo[5,1-b][1,3]thiazol-7-amine 7.

EXAMPLE L 2-Methyl-imidazo[5,1-b]oxazol-7-amine 6, Obtainable from the Following Synthesis Strategy

Bromination of 2-methylimidazole (CAS 693-98-1) with bromine gives imidazole 1 (J. Chem. Soc., 1922, 2628). Reduction of compound 1 with sodium sulfite leads to imidazole 2 (J. Chem. Soc., 1922, 2628). Nitration of compound 2 with a mixture of nitric and sulfuric acid affords compound 3 (J. Chem. Soc., 1922, 2628). Reaction of compound 3 with chloroacetone (CAS 78-95-5) leads to compound 4 (see similar procedure in Khim. Geterotsikl. Soedin., 1981, 833). Cyclization of compound 4 with potassium tert-butoxide gives compound 5 (see similar procedure in Heterocycles, 1999, 50, 1081). Reduction of compound 5 with hydrogen under palladium affords compound 2-methylimidazo[5,1-b][1,3]oxazol-7-amine 6. Keratin Dyeing Composition Components

The inventive compositions for the oxidative dyeing of keratin fibers comprise the hair-dyeing compound described above in the hair-dyeing compounds section and a medium suitable for dyeing. The inventive compositions may further comprise additional components known, conventionally used, or otherwise effective for use in oxidative dye compositions, including but limited to: developer dye compounds; coupler dye compounds; direct dyes; oxidizing agents; thickeners; chelants; pH modifiers and buffering agents; carbonate ion sources and radical scavenger systems; anionic, cationic, nonionic, amphoteric or zwitterionic surfactants, or mixtures thereof; anionic, cationic, nonionic, amphoteric or zwitterionic polymers, or mixtures thereof; fragrances; buffers; dispersing agents; peroxide stabilizing agents; natural ingredients, e.g. proteins and protein derivatives, and plant materials (e.g. aloe, chamomile and henna extracts); silicones (volatile or non-volatile, modified or non-modified), film-forming agents, ceramides, preserving agents; and opacifiers.

Some adjuvants referred to above, but not specifically described below, which are suitable are listed in the International Cosmetics Ingredient Dictionary and Handbook, (8^(th) ed.; The Cosmetics, Toiletry, and Fragrance Association). Particularly, vol. 2, sections 3 (Chemical Classes) and 4 (Functions) are useful in identifying specific adjuvants to achieve a particular purpose or multipurpose.

A. Medium Suitable for Dyeing

The medium suitable for dyeing may be selected from water, or a mixture of water and at least one organic solvent to dissolve the compounds that would not typically be sufficiently soluble in water. Suitable organic solvents for use herein include, but are not limited to: C1 to C4 lower alkanols (e.g., ethanol, propanol, isopropanol), aromatic alcohols (e.g. benzyl alcohol and phenoxyethanol); polyols and polyol ethers (e.g., carbitols, 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether, monomethyl ether, hexylene glycol, glycerol, ethoxy glycol), and propylene carbonate. When present, organic solvents are typically present in an amount ranging from 1% to 30%, by weight, of the composition. Preferred solvents are water, ethanol, propanol, isopropanol, glycerol, 1,2-propylene glycol, hexylene glycol, ethoxy diglycol, and mixtures thereof. Additional mediums suitable for dyeing may include oxidizing agents as described below.

B. Auxiliary Developers

Suitable developers for use in the compositions described herein include, but are not limited to p-phenylenediamine derivatives, e.g. benzene-1,4-diamine (commonly known as p-phenylenediamine), 2-methyl-benzene-1,4-diamine, 2-chloro-benzene-1,4-diamine, N-phenyl-benzene-1,4-diamine, N-(2-ethoxyethyl)benzene-1,4-diamine, 2-[(4-amino-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol, (commonly known as N,N-bis(2-hydroxyethyl)-p-phenylenediamine) (2,5-diamino-phenyl)-methanol, 1-(2′-Hydroxyethyl)-2,5-diaminobenzene, 2-(2,5-diamino-phenyl)-ethanol, N-(4-aminophenyl)benzene-1,4-diamine, 2,6-dimethyl-benzene-1,4-diamine, 2-isopropyl-benzene-1,4-diamine, 1-[(4-aminophenyl)amino]-propan-2-ol, 2-propyl-benzene-1,4-diamine, 1,3-bis[(4-aminophenyl)(2-hydroxyethyl)amino]propan-2-ol, N⁴,N⁴,2-trimethylbenzene-1,4-diamine, 2-methoxy-benzene-1,4-diamine, 1-(2,5-diaminophenyl)ethane-1,2-diol, 2,3-dimethyl-benzene-1,4-diamine, N-(4-amino-3-hydroxy-phenyl)acetamide, 2,6-diethylbenzene-1,4-diamine, 2,5-dimethylbenzene-1,4-diamine, 2-thien-2-ylbenzene-1,4-diamine, 2-thien-3-ylbenzene-1,4-diamine, 2-pyridin-3-ylbenzene-1,4-diamine, 1,1′-biphenyl-2,5-diamine, 2-(methoxymethyl)benzene-1,4-diamine, 2-(aminomethyl)benzene-1,4-diamine, 2-(2,5-diaminophenoxy)ethanol, N-[2-(2,5-diaminophenoxy)ethyl]-acetamide, N,N-dimethylbenzene-1,4-diamine, N,N-diethylbenzene-1,4-diamine, N,N-dipropylbenzene-1,4-diamine, 2-[(4-aminophenyl)(ethyl)amino]ethanol, 2-[(4-amino-3-methyl-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol, N-(2-methoxyethyl)-benzene-1,4-diamine, 3-[(4-aminophenyl)amino]propan-1-ol, 3-[(4-aminophenyl)-amino]propane-1,2-diol, N-{4-[(4-aminophenyl)amino]butyl}benzene-1,4-diamine, and 2-[2-(2-{2-[(2,5-diaminophenyl)-oxy]ethoxy}ethoxy)ethoxy]benzene-1,4-diamine; 1,3-Bis(N(2-Hydroxyethyl)-N-(4-amino-phenyl)amino)-2-propanol; 2,2′-[1,2-Ethanediyl-bis-(oxy-2,1-ethanediyloxy)]-bis-benzene-1,4-diamine; N,N-Bis(2-hydroxyethyl)-p-phenylinediamine; p-aminophenol derivatives such as: 4-amino-phenol (commonly known as p-aminophenol), 4-methylamino-phenol, 4-amino-3-methyl-phenol, 4-amino-2-hydroxymethyl-phenol, 4-amino-2-methyl-phenol, 4-amino-1-hydroxy-2-(2′-hydroxyethylaminomethyl)benzene, 4-amino-2-methoxymethyl-phenol, 5-amino-2-hydroxy-benzoic acid, 1-(5-amino-2-hydroxy-phenyl)-ethane-1,2-diol, 4-amino-2-(2-hydroxy-ethyl)-phenol, 4-amino-3-(hydroxymethyl)phenol, 4-amino-3-fluoro-phenol, 4-amino-2-(aminomethyl)-phenol, 4-amino-2-fluoro-phenol; 1-Hydroxy-2,4-diaminobenzene; 1-(2′-Hydroxyethyloxy)-2,4-diaminobenzene; 2,4-Diamino-5-methylphenetol; o-phenylenediamine derivatives such as: 3,4-Diaminobenzoic acid and salts thereof; o-aminophenol derivatives such as: 2-amino-phenol (commonly known as o-aminophenol), 2,4-diaminophenol, 2-amino-5-methyl-phenol, 2-amino-6-methyl-phenol, N-(4-amino-3-hydroxy-phenyl)-acetamide, and 2-amino-4-methyl-phenol; and heterocyclic derivatives such as: pyrimidine-2,4,5,6-tetramine (commonly known as 2,4,5,6-tetraaminopyridine), 1-methyl-1H-pyrazole-4,5-diamine, 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol, N²,N²-dimethyl-pyridine-2,5-diamine, 2-[(3-amino-6-methoxypyridin-2-yl)amino]ethanol, 6-methoxy-N²-methyl-pyridine-2,3-diamine, 2,5,6-triaminopyrimidin-4(1H)-one, pyridine-2,5-diamine, 1-isopropyl-1H-pyrazole-4,5-diamine, 1-(4-methylbenzyl)-1H-pyrazole-4,5-diamine, 1-(benzyl)-1H-pyrazole-4,5-diamine, 1-(4-chlorobenzyl)-1H-pyrazole-4,5-diamine, pyrazolo[1,5-a]-pyrimidine-3,7-diamine, 5,6,7-trimethylpyrazolo[1,5-a]pyrimidin-3-ylamine hydrochloride, 7-methylpyrazolo[1,5-a]pyrimidin-3-ylamine hydrochloride, 2,5,6,7-tetramethyl-pyrazolo[1,5-a]pyrimidin-3-ylamine hydrochloride, 5,7-di-tert-butylpyrazolo[1,5-a]pyrimidin-3-ylamine hydrochloride, 5,7-di-trifluoromethyl-pyrazolo[1,5-a]pyrimidin-3-ylamine hydrochloride, 2-methylpyrazolo[1,5-a]pyrimidin-3,7-diamine hydrochloride; 4-Hydroxy-2,5,6-triaminopyrimidine; 1-(2′hydroxyethyl)-amino-3,4-methylene dioxybenzene; and 1-Hydroxyethyl-4,5-diaminopyrazole sulphate.

Additional developers are selected from the group consisting of N-(3-furylmethyl)benzene-1,4-diamine; N-Thiophen-3-ylmethyl-benzene-1,4-diamine; N-(2-furylmethyl)benzene-1,4-diamine; N-Thiophen-2-ylmethyl-benzene-1,4-diamine; 4-Hydroxy-benzoic acid (2,5-diamino-benzylidene)-hydrazide; 3-(2,5-Diamino-phenyl)-N-ethyl-acrylamide; 2-[3-(3-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 2-[3-(4-Amino-phenylamino-propenyl]-benzene-1,4-diamine; 2-(6-Methyl-pyridin-2-yl)-benzene-1,4-diamine; 2-Pyridin-2-yl-benzene-1,4-diamine; 2-[3-(4-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 2-[3-(3-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 3-(2,5-Diamino-phenyl)-N-ethyl-acrylamide; 2-Thiazol-2-yl-benzene-1,4-diamine; 4-Hydroxy-benzoic acid (2,5-diamino-benzylidene)-hydrazide; 3′-Fluoro-biphenyl-2,5-diamine; 2-Propenyl-benzene-1,4-diamine; 2′-Chloro-biphenyl-2,5-diamine; N-Thiophen-3-ylmethyl-benzene-1,4-diamine; N-(3-furylmethyl)benzene-1,4-diamine; 4′-Methoxy-biphenyl-2,5-diamine; N-(4-Amino-benzyl)-benzene-1,4-diamine; 2-Methyl-5-[(1-H-pyrrol-2-ylmethyl)-amino]-phenol; 5-[(Furan-2-ylmethyl)-amino]-2-methyl-phenol; 5-Isopropylamino-2-methyl-phenol; Biphenyl-2,4,4′-triamine hydrochloride; 5-(4-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 5-Phenylaminomethyl-benzene-1,3-diamine hydrochloride; 2-[4-Amino-2-(3,5-diamino-benzylamino)-phenoxy]-ethanol hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; N-(2-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Furan-2-ylmethyl-benzene-1,3-diamine hydrochloride; 2-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; 4-Amino-2-propylaminomethyl-phenol; hydrochloride; N-Benzo[1,3]dioxol-5-ylmethyl-benzene-1,3-diamine hydrochloride; N-[4-Amino-2-(2-hydroxy-ethyl)-2H-pyrazol-3-yl]-3-(5-amino-2-hydroxy-phenyl)-acrylamide; hydrochloride; 4-Amino-2-(isopropylamino-methyl)-phenol; hydrochloride; 4-Thiophen-3-yl-benzene-1,3-diamine; hydrochloride hydrochloride; 5-Phenylaminomethyl-benzene-1,3-diamine hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 4-Thiophen-3-yl-benzene-1,3-diamine; hydrochloride; 2′,4′-Diamino-biphenyl-4-ol; hydrochloride; 5-Cyclobutylamino-2-methyl-phenol; 5-Cyclobutylamino-2-methyl-phenol; 4-Amino-2-(pyridin-3-ylaminomethyl)-phenol; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 5-Allylaminomethyl-benzene-1,3-diamine hydrochloride; N-(4-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Benzyl-benzene-1,3-diamine hydrochloride; 3-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-(4-Methoxy-benzyl)-benzene-1,3-diamine hydrochloride; N-Thiophen-2-ylmethyl-benzene-1,3-diamine hydrochloride; 4-Amino-2-[(2-hydroxy-5-nitro-phenylamino)-methyl]-phenol; hydrochloride; 2′,4′-Diamino-biphenyl-4-ol hydrochloride; Biphenyl-2,4,4′-triamine; 5-(4-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 2-[4-Amino-2-(3,5-diamino-benzylamino)-phenoxy]-ethanol hydrochloride; 5-Allylaminomethyl-benzene-1,3-diamine hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; N-(4-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Benzyl-benzene-1,3-diamine hydrochloride; 3-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-(2-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-(4-Methoxy-benzyl)-benzene-1,3-diamine hydrochloride; N-Furan-2-ylmethyl-benzene-1,3-diamine hydrochloride; 2-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-Thiophen-2-ylmethyl-benzene-1,3-diamine hydrochloride; N-Benzo[1,3]dioxol-5-ylmethyl-benzene-1,3-diamine hydrochloride; N-[4-Amino-2-(2-hydroxy-ethyl)-2H-pyrazol-3-yl]-3-(5-amino-2-hydroxy-phenyl)-acrylamide hydrochloride; 4-Amino-2-propylaminomethyl-phenol; hydrochloride; 4-Amino-2-(isopropylamino-methyl)-phenol hydrochloride; 4-Amino-2-[(2-hydroxy-5-nitro-phenylamino)-methyl]-phenol hydrochloride; 2-Methyl-5-[(1-H-pyrrol-2-ylmethyl)-amino]-phenol; 5-[(Furan-2-ylmethyl)-amino]-2-methyl-phenol; 5-Isopropylamino-2-methyl-phenol; 5-Cyclobutylamino-2-methyl-phenol; 4-Amino-2-(pyridin-3-ylaminomethyl)-phenol; and 5-Cyclobutylamino-2-methyl-phenol.

Preferred developers include but are not limited to: p-phenylenediamine derivatives such as: 2-methyl-benzene-1,4-diamine; benzene-1,4-diamine; 1-(2,5-diamino-phenyl)-ethanol; 2-(2,5-diamino-phenyl)-ethanol; N-(2-methoxyethyl)benzene-1,4-diamine; 2-[(4-amino-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol; 1-(2,5-diaminophenyl)ethane-1,2-diol; 1-(2′-Hydroxyethyl)-2,5-diaminobenzene; 1,3-Bis(N(2-Hydroxyethyl)-N-(4-amino-phenyl)amino)-2-propanol; 2,2′-[1,2-Ethanediyl-bis-(oxy-2,1-ethanediyloxy)]-bis-benzene-1,4-diamine; N,N-Bis(2-hydroxyethyl)-p-phenylinediamine; and mixtures thereof; p-aminophenol derivatives such as: 4-amino-phenol, 4-methylamino-phenol, 4-amino-3-methyl-phenol, 4-amino-2-methoxymethyl-phenol; 1-(5-amino-2-hydroxy-phenyl)-ethane-1,2-diol; 1-Hydroxy-2,4-diaminobenzene; 1-(2′-Hydroxyethyloxy)-2,4-diaminobenzene; 4-Amino-2-aminomethylphenol; 2,4-Diamino-5-methylphenetol; 4-Amino-1-hydroxy-2-(2′-hydroxyethylaminomethyl)benzene; 1-methoxy-2-amino-4-(2′-hydroxyethylamino)benzene; 5-aminosalicylic acid and salts thereof; and mixtures thereof; o-phenylenediamine derivatives such as: 3,4-Diaminobenzoic acid and salts thereof; o-aminophenol derivatives such as: 2-amino-phenol, 2-amino-5-methyl-phenol, 2-amino-6-methyl-phenol, N-(4-amino-3-hydroxy-phenyl)-acetamide; 2-amino-4-methyl-phenol; and mixtures thereof; and heterocyclic derivatives such as: pyrimidine-2,4,5,6-tetramine; 1-methyl-1H-pyrazole-4,5-diamine; 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol; 1-(4-methylbenzyl)-1H-pyrazole-4,5-diamine; 1-(benzyl)-1H-pyrazole-4,5-diamine; N²,N²-dimethyl-pyridine-2,5-diamine; 4-Hydroxy-2,5,6-triaminopyrimidine; 1-(2′hydroxyethyl)-amino-3,4-methylene dioxybenzene; and 1-Hydroxyethyl-4,5-diaminopyrazole sulphate; and mixtures thereof.

More preferred developers include: 2-methyl-benzene-1,4-diamine; benzene-1,4-diamine; N,N-Bis(2-hydroxyethyl)-p-phenylenediamine; 4-amino-phenol; 4-methylamino-phenol; 4-amino-3-methyl-phenol; 1-Hydroxy-2,4-diaminobenzene; 2-amino-phenol; 2-amino-5-methyl-phenol; 2-amino-6-methyl-phenol; 1-methyl-1H-pyrazole-4,5-diamine; 1-Hydroxyethyl-4,5-diaminopyrazole sulphate; 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol; and mixtures thereof.

C. Auxiliary Couplers

Suitable couplers for use in the compositions described herein include, but are not limited to: phenols, resorcinol and naphthol derivatives such as: naphthalene-1,7-diol, benzene-1,3-diol, 4-chlorobenzene-1,3-diol, naphthalen-1-ol, 2-methyl-naphthalen-1-ol, naphthalene-1,5-diol, naphthalene-2,7-diol, benzene-1,4-diol, 2-methyl-benzene-1,3-diol, 7-amino-4-hydroxy-naphthalene-2-sulfonic acid, 2-isopropyl-5-methylphenol, 1,2,3,4-tetrahydro-naphthalene-1,5-diol, 2-chloro-benzene-1,3-diol, 4-hydroxy-naphthalene-1-sulfonic acid, benzene-1,2,3-triol, naphthalene-2,3-diol, 5-dichloro-2-methylbenzene-1,3-diol, 4,6-dichlorobenzene-1,3-diol, 2,3-dihydroxy-[1,4]naphthoquinone; and 1-Acetoxy-2-methylnaphthalene; m-phenylenediamines such as: 2,4-diaminophenol, benzene-1,3-diamine, 2-(2,4-diamino-phenoxy)-ethanol, 2-[(3-amino-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol, 2-mehyl-benzene-1,3-diamine, 2-[[2-(2,4-diamino-phenoxy)-ethyl]-(2-hydroxy-ethyl)-amino]-ethanol, 4-{3-[(2,4-diaminophenyl)oxy]propoxy}benzene-1,3-diamine, 2-(2,4-diamino-phenyl)-ethanol, 2-(3-amino-4-methoxy-phenylamino)-ethanol, 4-(2-amino-ethoxy)-benzene-1,3-diamine, (2,4-diamino-phenoxy)-acetic acid, 2-[2,4-diamino-5-(2-hydroxy-ethoxy)-phenoxy]-ethanol, 4-ethoxy-6-methyl-benzene-1,3-diamine, 2-(2,4-diamino-5-methyl-phenoxy)-ethanol, 4,6-dimethoxy-benzene-1,3-diamine, 2-[3-(2-hydroxy-ethylamino)-2-methyl-phenylamino]-ethanol, 3-(2,4-diamino-phenoxy)-propan-1-ol, N-[3-(dimethylamino)phenyl]urea, 4-methoxy-6-methylbenzene-1,3-diamine, 4-fluoro-6-methylbenzene-1,3-diamine, 2-({3-[(2-hydroxyethyl)amino]-4,6-dimethoxyphenyl}-amino)ethanol, 3-(2,4-diaminophenoxy)-propane-1,2-diol, 2-[2-amino-4-(methylamino)-phenoxy]ethanol, 2-[(5-amino-2-ethoxy-phenyl)-(2-hydroxy-ethyl)-amino]-ethanol, 2-[(3-aminophenyl)amino]ethanol, 2,4-Diamino-5-(2′-hydroxyethyloxy)toluene; N,N-Dimethyl-3-ureidoaniline; N-(2-aminoethyl)benzene-1,3-diamine, 4-{[(2,4-diamino-phenyl)oxy]methoxy}-benzene-1,3-diamine, 1-methyl-2,6-bis(2-hydroxyethylamino)benzene; and 2,4-dimethoxybenzene-1,3-diamine; m-aminophenols such as: 3-amino-phenol, 2-(3-hydroxy-4-methyl-phenylamino)-acetamide, 2-(3-hydroxy-phenylamino)-acetamide, 5-amino-2-methyl-phenol, 5-(2-hydroxy-ethylamino)-2-methyl-phenol, 5-amino-2,4-dichloro-phenol, 3-amino-2-methyl-phenol, 3-amino-2-chloro-6-methyl-phenol, 5-amino-2-(2-hydroxy-ethoxy)-phenol, 2-chloro-5-(2,2,2-trifluoro-ethylamino)-phenol, 5-amino-4-chloro-2-methyl-phenol, 3-cyclopentylamino-phenol, 5-[(2-hydroxyethyl)amino]-4-methoxy-2-methylphenol, 5-amino-4-methoxy-2-methylphenol, 3-(dimethylamino)phenol, 3-(diethylamino)phenol, 5-amino-4-fluoro-2-methylphenol, 5-amino-4-ethoxy-2-methylphenol, 3-amino-2,4-dichloro-phenol, 3-[(2-methoxyethyl)amino]phenol, 3-[(2-hydroxyethyl)amino]phenol, 5-amino-2-ethyl-phenol, 5-amino-2-methoxyphenol, 5-[(3-hydroxy-propyl)amino]-2-methylphenol, 3-[(3-hydroxy-2-methylphenyl)-amino]propane-1,2-diol, 3-[(2-hydroxyethyl)amino]-2-methylphenol; 1-Methyl-2-hydroxy-4-(2′-hydroxyethyl)amino-benzene; 1,3-Bis-(2,4-Diaminophenoxy)propane; 1-Hydroxy-2-methyl-5-amino-6-chlorobenzene; and heterocyclic derivatives such as: 3,4-dihydro-2H-1,4-benzoxazin-6-ol, 4-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 6-methoxyquinolin-8-amine, 4-methylpyridine-2,6-diol, 2,3-dihydro-1,4-benzodioxin-5-ol, 1,3-benzodioxol-5-ol, 2-(1,3-benzodioxol-5-ylamino)ethanol, 3,4-dimethylpyridine-2,6-diol, 5-chloropyridine-2,3-diol, 2,6-dimethoxypyridine-3,5-diamine, 1,3-benzodioxol-5-amine, 2-{[3,5-diamino-6-(2-hydroxy-ethoxy)-pyridin-2-yl]oxy}-ethanol, 1H-indol-4-ol, 5-amino-2,6-dimethoxypyridin-3-ol, 1H-indole-5,6-diol, 1H-indol-7-ol, 1H-indol-5-ol, 1H-indol-6-ol, 6-bromo-1,3-benzodioxol-5-ol, 2-aminopyridin-3-ol, pyridine-2,6-diamine, 3-[(3,5-diaminopyridin-2-yl)oxy]propane-1,2-diol, 5-[(3,5-diaminopyridin-2-yl)oxy]pentane-1,3-diol, 1H-indole-2,3-dione, indoline-5,6-diol, 3,5-dimethoxypyridine-2,6-diamine, 6-methoxypyridine-2,3-diamine; 3,4-dihydro-2H-1,4-benzoxazin-6-amine; 4-hydroxy-N-methylindole, 1H-5-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[1,5-b]-1,2,4-triazole, 2,6-dimethyl[3,2-c]-1,2,4-triazole, 6-methylpyrazolo-[1,5-a]benzimidazole, 2,6-dihydroxypyridine, 2,6-dihydroxy-3,4-dimethylpyridine, 5-methylpyrazolo[5,1-e]-1,2,3-triazole, 5-methyl-6-chloropyrazolo[5,1-e]-1,2,3,-triazole, 5-phenylpyrazolo[5,1-e]-1,2,3-triazole and its addition salts, 1H-2,6-dimethylpyrazolo[1,5-b]-1,2,4-triazole tosylate, 7,8-dicyano-4-methylimidazolo-[3,2-a]imidazole, 2,7-dimethylpyrazolo[1,5-a]pyrimidin-5-one, 2,5-dimethylpyrazolo[1,5-a]pyrimidin-7-one, and 2-methyl-5-methoxymethyl-pyrazolo[1,5-a]pyrimidin-7-one; 6-Hydroxybenzomorpholine; and 3-Amino-2-methylamino-6-methoxypyridine; 1-Phenyl-3-methyl-5-pyrazolone-2,4-dihydro-5,2-phenyl-3H-pyrazole-3-one.

Additional couplers are selected from the group consisting of N-(3-furylmethyl)benzene-1,4-diamine; N-Thiophen-3-ylmethyl-benzene-1,4-diamine; N-(2-furylmethyl)benzene-1,4-diamine; N-Thiophen-2-ylmethyl-benzene-1,4-diamine; 4-Hydroxy-benzoic acid (2,5-diamino-benzylidene)-hydrazide; 3-(2,5-Diamino-phenyl)-N-ethyl-acrylamide; 2-[3-(3-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 2-[3-(4-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 2-(6-Methyl-pyridin-2-yl)-benzene-1,4-diamine; 2-Pyridin-2-yl-benzene-1,4-diamine; 2-[3-(4-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 2-[3-(3-Amino-phenylamino)-propenyl]-benzene-1,4-diamine; 3-(2,5-Diamino-phenyl)-N-ethyl-acrylamide; 2-Thiazol-2-yl-benzene-1,4-diamine; 4-Hydroxy-benzoic acid (2,5-diamino-benzylidene)-hydrazide; 3′-Fluoro-biphenyl-2,5-diamine; 2-Propenyl-benzene-1,4-diamine; 2′-Chloro-biphenyl-2,5-diamine; N-Thiophen-3-ylmethyl-benzene-1,4-diamine; N-(3-furylmethyl)benzene-1,4-di amine; 4′-Methoxy-biphenyl-2,5-diamine; N-(4-Amino-benzyl)-benzene-1,4-diamine; 2-Methyl-5-[(1-H-pyrrol-2-ylmethyl)-amino]-phenol; 5-[(Furan-2-ylmethyl)-amino]-2-methyl-phenol; 5-Isopropylamino-2-methyl-phenol; Biphenyl-2,4,4′-triamine hydrochloride; 5-(4-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 5-Phenylaminomethyl-benzene-1,3-diamine hydrochloride; 2-[4-Amino-2-(3,5-diamino-benzylamino)-phenoxy]-ethanol hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; N-(2-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Furan-2-ylmethyl-benzene-1,3-diamine hydrochloride; 2-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; 4-Amino-2-propylaminomethyl-phenol; hydrochloride; N-Benzo[1,3]dioxol-5-ylmethyl-benzene-1,3-diamine hydrochloride; N-[4-Amino-2-(2-hydroxy-ethyl)-2H-pyrazol-3-yl]-3-(5-amino-2-hydroxy-phenyl)-acrylamide; hydrochloride; 4-Amino-2-(isopropylamino-methyl)-phenol; hydrochloride; 4-Thiophen-3-yl-benzene-1,3-diamine; hydrochloride hydrochloride; 5-Phenylaminomethyl-benzene-1,3-diamine hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 4-Thiophen-3-yl-benzene-1,3-diamine; hydrochloride; 2′,4′-Diamino-biphenyl-4-ol; hydrochloride; 5-Cyclobutylamino-2-methyl-phenol; 5-Cyclobutylamino-2-methyl-phenol; 4-Amino-2-(pyridin-3-ylaminomethyl)-phenol; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 5-Allylaminomethyl-benzene-1,3-diamine hydrochloride; N-(4-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Benzyl-benzene-1,3-diamine hydrochloride; 3-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-(4-Methoxy-benzyl)-benzene-1,3-diamine hydrochloride; N-Thiophen-2-ylmethyl-benzene-1,3-diamine hydrochloride; 4-Amino-2-[(2-hydroxy-5-nitro-phenylamino)-methyl]-phenol; hydrochloride; 2′,4′-Diamino-biphenyl-4-ol hydrochloride; Biphenyl-2,4,4′-triamine; 5-(4-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; 2-[4-Amino-2-(3,5-diamino-benzylamino)-phenoxy]-ethanol hydrochloride; 5-Allylaminomethyl-benzene-1,3-diamine hydrochloride; 5-(3-Amino-phenyl)aminomethyl-benzene-1,3-diamine hydrochloride; N-(4-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-Benzyl-benzene-1,3-diamine hydrochloride; 3-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-(2-Amino-benzyl)-benzene-1,3-diamine hydrochloride; N-(4-Methoxy-benzyl)-benzene-1,3-diamine hydrochloride; N-Furan-2-ylmethyl-benzene-1,3-diamine hydrochloride; 2-[(3-Amino-phenylamino)-methyl]-phenol hydrochloride; N-Thiophen-2-ylmethyl-benzene-1,3-diamine hydrochloride; N-Benzo[1,3]dioxol-5-ylmethyl-benzene-1,3-diamine hydrochloride; N-[4-Amino-2-(2-hydroxy-ethyl)-2H-pyrazol-3-yl]-3-(5-amino-2-hydroxy-phenyl)-acrylamide hydrochloride; 4-Amino-2-propylaminomethyl-phenol; hydrochloride; 4-Amino-2-(isopropylamino-methyl)-phenol hydrochloride; 4-Amino-2-[(2-hydroxy-5-nitro-phenylamino)-methyl]-phenol hydrochloride; 2-Methyl-5-[(1-H-pyrrol-2-ylmethyl)-amino]-phenol; 5-[(Furan-2-ylmethyl)-amino]-2-methyl-phenol; 5-Isopropylamino-2-methyl-phenol; 5-Cyclobutylamino-2-methyl-phenol; 4-Amino-2-(pyridin-3-ylaminomethyl)-phenol; and 5-Cyclobutylamino-2-methyl-phenol.

Preferred couplers include but are not limited to: phenol, resorcinol, and naphthol derivatives such as: naphthalene-1,7-diol, benzene-1,3-diol, 4-chlorobenzene-1,3-diol, naphthalen-1-ol, 2-methyl-naphthalen-1-ol, naphthalene-1,5-diol, naphthalene-2,7-diol, benzene-1,4-diol, 2-methyl-benzene-1,3-diol, and 2-isopropyl-5-methylphenol; 1,2,4-Trihydroxybenzene; 1-Acetoxy-2-methylnaphthalene;and mixtures thereof; m-phenylenediamine derivatives such as: benzene-1,3-diamine, 2-(2,4-diamino-phenoxy)-ethanol, 4-{3-[(2,4-diaminophenyl)oxy]propoxy}benzene-1,3-diamine, 2-(3-amino-4-methoxy-phenylamino)-ethanol, 2-[2,4-diamino-5-(2-hydroxy-ethoxy)-phenoxy]-ethanol, and 3-(2,4-diamino-phenoxy)-propan-1-ol; 2,4-Diamino-5-(2′-hydroxyethyloxy)toluene; N,N-Dimethyl-3-ureidoaniline; 2,4-Diamino-5-fluorotoluenesulfatehydrate; 1-methyl-2,6-bis(2-hydroxyethylamino)benzene; and mixtures thereof; m-aminophenol derivatives such as: 3-amino-phenol, 5-amino-2-methyl-phenol, 5-(2-hydroxy-ethylamino)-2-methyl-phenol, and 3-amino-2-methyl-phenol; 1-Methyl-2-hydroxy-4-(2′-hydroxyethyl)aminobenzene; 1-Hydroxy-3-amino-2,4-dichlorobenzene; 1,3-Bis-(2,4-Diaminophenoxy)propane; 1-Hydroxy-2-methyl-5-amino-6-chlorobenzene; 5-Amino-4-chloro-2-methylphenol; and mixtures thereof; and heterocyclic derivatives such as: 3,4-dihydro-2H-1,4-benzoxazin-6-ol, 4-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 1,3-benzodioxol-5-ol, 1,3-benzodioxol-5-amine, 1H-indol-4-ol, 1H-indole-5,6-diol, 1H-indol-7-ol, 1H-indol-5-ol, 1H-indol-6-ol, 1H-indole-2,3-dione, pyridine-2,6-diamine, 2-aminopyridin-3-ol, 4-hydroxy-N-methylindole, 1H-5-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[1,5-b]-1,2,4-triazole, 2,6-dimethyl[3,2-c]-1,2,4-triazole, 6-methylpyrazolo-[1,5-a]benzimidazole; 2,6-dihydroxypyridine; 2,6-dihydroxy-3,4-dimethylpyridine; 6-Hydroxybenzomorpholine; 2,6-Dihydroxy-3,4-dimethylpyridine; 3,5-Diamino-2,6-dimethoxypyridine; 3-Amino-2-methylamino-6-methoxypyridine; 1-Phenyl-3-methyl-5-pyrazolone-2,4-dihydro-5,2-phenyl-3H-pyrazole-3-one; and mixtures thereof.

More preferred couplers include: benzene-1,3-diol; 4-chlorobenzene-1,3-diol; 2-methyl-benzene-1,3-diol; benzene-1,3-diamine; 3-amino-phenol; 5-amino-2-methyl-phenol; 1-Methyl-2-hydroxy-4-(2′-hydroxyethyl)aminobenzene; 4-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one; 2-aminopyridin-3-ol; 1-phenyl-3-methylpyrazol-5-one; 1-Phenyl-3-methyl-5-pyrazolone-2,4-dihydro-5,2-phenyl-3H-pyrazole-3-one; and mixtures thereof.

Additional preferred developers and couplers include 5-methoxymethyl-2-aminophenol, 5-ethyl-2-aminophenol, 5-phenyl-2-aminophenol, and 5-cyanoethyl-2-aminophenol.

Further additional preferred developers and couplers include: 5-membered heteroaromatic keratin dyeing compounds with one, two, or three heteroatoms relating to the following compounds:

wherein Z is selected from the group consisting of S and O;

wherein Y is selected from the group consisting of NA¹, S and O; Bicyclic fused 5-5 heteroaromatic keratin dyeing compounds with two or three heteroatoms relating to the following compounds:

wherein Y and Z are independently selected from the group consisting of NA¹, S and O;

Tricyclic 5-6-5 heteroaromatic keratin dyeing compounds having two heteroatoms according to the following formulas:

wherein Y and Z are selected from the group consisting of NA¹, S, and O; Bicyclic 5-6 heteroaromatic keratin dyeing compounds with one ring junction nitrogen and one or two extra heteroatoms according to the following formulas:

Tricyclic fused 6-5-6 heteroaromatic keratin dyeing compounds having one heteroatom according to the following formula:

wherein Y is independently selected from the group consisting of NA¹, S and O; 5-membered aza heteroaromatic keratin dyeing compounds with an N-hydroxy or N-amino group and derivatives thereof, according to the following formulas:

wherein B₁, B₂, B₃, and B₄ are selected from the group consisting of CH and N;

wherein the corresponding R¹, R², R³, and R⁴ is absent when B is N; Bicyclic 5-6 systems of aza heteroaromatic keratin dyeing compounds wherein the 5-membered rings have one to three nitrogen atoms and an N-hydroxy or N-amino group and derivatives thereof, according to the following formulas:

wherein B₁ and B₂ are independently selected from CH or N;

wherein the corresponding R¹ and R² is absent when B is N; Bicyclic fused 5-5-membered aza heteroaromatic keratin dyeing compounds with an N-hydroxy or N-amino group and derivatives thereof, according to the following formulas:

Bicyclic fused 5-5-membered aza heteroaromatic keratin dyeing compounds having a ring junction nitrogen and an N-hydroxy or N-amino group and derivatives thereof, according to the following formulas:

Bicyclic fused 5-5-membered aza heteroaromatic keratin dyeing compounds having a ring junction nitrogen and an N-hydroxy or N-amino group and derivatives thereof, according to the following formulas:

-   wherein B₁, B₂, B₃, B₄, and B₅ are selected from the group     consisting of CH and N; -   wherein the corresponding R1, R2, R3, R4, and R5 is absent when B is     N; -   wherein all of the aforementioned R groups are the same or different     and are selected from the group consisting of:     -   (a) C-linked monovalent substituents selected from the group         consisting of:         -   (i) substituted or unsubstituted, straight or branched,             alkyl, mono- or poly-unsaturated alkyl, heteroalkyl,             aliphatic, heteroaliphatic, or heteroolefinic systems,         -   (ii) substituted or unsubstituted, mono- or poly-cyclic             aliphatic, aryl, or heterocyclic systems, and         -   (iii) substituted or unsubstituted, mono-, poly-, or             per-fluoro alkyl systems; wherein said systems of (i), (ii)             and (iii) comprise from about 1 to about 10 carbon atoms and             from about 0 to about 5 heteroatoms selected from the group             consisting of O, S, N, P, and Si;         -   wherein substituents of the substituted systems of the             C-linked monovalent substituents are selected from the group             consisting of amino, hydroxyl, alkylamino (linear or             branched C1–C5), dialkylamino (linear or branched C1–C5),             hydroxyalkylamino (linear or branched C1–C5),             dihydroxyalkylamino (linear or branched C1–C5), arylamino or             substituted arylamino (substituents are halogen, C1–C5             alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino), heteroarylamino or substituted heteroarylamino             (substituents are halogen, C1–C5 alkyl, C1–C5 alkoxy,             trifluoromethyl, amino, C1–C5 alkylamino), arylmethylamino             or substituted arylmethylamino (substituents are halogen,             C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino), and heteroarylmethylamino or substituted             heteroarylmethylamino (substituents are halogen, C1–C5             alkyl, C1–C5 alkoxy, trifluoromethyl, amino, C1–C5             alkylamino),     -   (b) S-linked monovalent substituents selected from the group         consisting of SA¹, SO₂A¹, SO₃A¹, SSA¹, SOA¹, SO₂NA¹A², SNA¹A²,         and SONA¹A²;     -   (c) O-linked monovalent substituents selected from the group         consisting of OA¹, and ONA¹A²;     -   (d) N-linked monovalent substituents selected from the group         consisting of NA¹A², (NA¹A²A³)⁺, NA¹OA², NA¹SA², NO₂, N═NA¹,         N═NOA¹, and NA¹CN, NA¹NA²A³;     -   (e) monovalent substituents selected from the group consisting         of COOA¹, CONA¹ ₂, CONA¹COA², C(═NA¹)NA¹A², CN, and X;     -   (f) fluoroalkyl monovalent substituents selected from the group         consisting of mono-, poly-, and per-fluoro alkyl systems         comprising from about 1 to about 12 carbon atoms and from about         0 to about 4 heteroatoms; and     -   (g) hydrogen,

wherein A¹, A², and A³ are monovalent and are independently selected from the group consisting of: H; substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems; substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems; and substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems, or A¹ and A² together with nitrogen atoms to which they are bound form a ring; wherein said systems comprise from about 1 to about 10 carbon atoms and from about 0 to about 5 heteroatoms selected from the group consisting of O, S, N, P, and Si; wherein X is a halogen selected from the group consisting of F, Cl, Br, and I.

D. Direct Dyes

The inventive compositions may also comprise compatible direct dyes, in an amount sufficient to provide additional coloring, particularly with regard to intensity. Typically, such an amount will range from 0.05% to 4%, by weight, of the composition. Suitable direct dyes include but are not limited to: Acid Yellow 1, Acid Orange 3, Disperse Red 17, Basic Brown 17, Acid Black 52, Acid Black 1, Disperse Violet 4, 4-Nitro-o-Phenylenediamine, 2-Nitro-p-Phenylenediamine, Picramic Acid, HC Red No. 13, 1,4-Bis-(2′-Hydroxyethyl)-amino-2-nitrobenzene, HC Yellow No. 5, HC Red No. 7, HC Blue No. 2, HC Yellow No. 4, HC Yellow No. 2, HC Orange No. 1, HC Red No. 1, 2-Chloro-5-nitro-N-Hydroxyethyl-p-phenylenediamine, HC Red No. 3, 4-Amino-3-nitrophenol, 2-Hydroxyethylamino-5-nitroanisole, 3-nitro-p-Hydroxyethylaminophenol, 2-amino-3-nitrophenol, 6-nitro-o-toluidine, 3-methylamino-4-nitrophenoxyethanol, 2-nitro-5-glycerymethylanaline, HC Yellow No. 11, HC Violet No. 1, HC Orange No. 2, HC Orange No. 3, HC Yellow No. 9, 4-Nitrophenyl Aminoethylurea, HC Red No. 10, HC Red No. 11, 2-Hydroxyethyl picramic acid, HC Blue No. 12, HC Yellow No. 6, Hydroxyethyl-2-nitro-p-toluidine, HC Yellow No. 12, HC Blue No. 10, HC Yellow No. 7, HC Yellow No. 10, HC Blue No. 9, N-ethyl-3-nitro PABA, 4-amino-2-nitrophenyl-amine-2′-carboxylic acid, 2-chloro-6-ethylamino-4-nitrophenol, 6-Nitro-2,5-pyridinediamine, HC Violet No. 2, 2-amino-6-chloro-4-nitrophenol, 4-hydroxypropylamino-3-nitrophenol, HC Yellow No. 13, 1,2,3,4-Tetrahydro-6-nitrochinoxalin, HC Red No. 14, HC Yellow No. 15, HC Yellow No. 14, 3-Amino-6-methylamino-2-nitropyridine, 2,6-diamino-3-((pyridine-3-yl)azo)pyridine, Basic Red No. 118, Basic Orange No. 69, N-(2-nitro-4-aminophenyl)-allylamine, 4-[(4-Amino-3-methylphenyl)(4-Imino-3-methyl-2,5-Cyclohexadien-1-ylidene) Methyl]-2-Methyl-benzeneamine-Hydrochloride, 1H-Imidazolium, 2-[[4-(dimethyl-amino)phenyl]azo]-1,3-dimethylchloride, Pyridinium, 1-methyl-4-[(methylphenyl-hydrazono)methyl]-, methyl sulfate, 1H-Imidazolium, 2-[(4-aminophenyl)azo]-1,3-dimethyl, chloride, Basic Red 22, Basic Red 76, Basic Brown 16, Basic Yellow 57, 7-(2′,4′-Dimethyl-5′-sulfophenylazo)-5-sulfo-8-hydroxynaphthalene, Acid Orange 7, Acid Red 33, 1-(3′-Nitro-5′-sulfo-6′-oxophenylazo)-oxo-naphthalene chromium complex, Acid Yellow 23, Acid Blue 9, Basic Violet 14, Basic Blue 7, Basic Blue 26, Sodium salt of mixture of mono- & disulfonic acids (mainly the latter) of quinophthlanone or 2-quinolylindandione, Basic Red 2, Basic Blue 99, Disperse Red 15, Acid Violet 43, Disperse Violet 1, Acid Blue 62, Pigment Blue 15, Acid Black 132, Basic Yellow 29, Disperse Black 9, 1-(N-Methylmorpholinium-propylamino)-4-hydroxy-anthraquinone methylsulfate, HC Blue No. 8, HC Red No. 8, HC Green No. 1, HC Red No. 9, 2-Hydroxy-1,4-naphthoquinone, Acid Blue 199, Acid Blue 25, Acid Red 4, Henna Red, Indigo, Cochenille, HC Blue 14, Disperse Blue 23, Disperse Blue 3, Violet 2, Disperse Blue 377, Basic Red 51, Basic Orange 31, Basic Yellow 87, and mixtures thereof. Preferred direct dyes include but are not limited to: Disperse Black 9, HC Yellow 2, HC Yellow 4, HC Yellow 15, 4-nitro-o-phenylenediamine, 2-amino-6-chloro-4-nitrophenol, HC Red 3, Disperse Violet 1, HC Blue 2, Disperse Blue 3, Disperse Blue 377, Basic Red 51, Basic Orange 31, Basic Yellow 87, and mixtures thereof.

E. Oxidizing Agent

The inventive compositions may comprise an oxidizing agent, present in an amount sufficient to bleach melanin pigment in hair and/or cause formation of dye chromophores from oxidative dye precursors (including developers and/or couplers when present). Typically, such an amount ranges from 1% to 20%, preferably from 3% to 15%, more preferably from 6% to 12%, by weight, of the developer composition. Inorganic peroxygen materials capable of yielding hydrogen peroxide in an aqueous medium are preferred, and include but are not limited to: hydrogen peroxide; inorganic alkali metal peroxides (e.g. sodium periodate and sodium peroxide); organic peroxides (e.g. urea peroxide, melamine peroxide); inorganic perhydrate salt bleaching compounds (e.g. alkali metal salts of perborates, percarbonates, perphosphates, persilicates, and persulphates, preferably sodium salts thereof), which may be incorporated as monohydrates, tetrahydrates, etc.; alkali metal bromates; enzymes; and mixtures thereof. Preferred is hydrogen peroxide.

F. Thickeners

The inventive compositions may comprise a thickener in an amount sufficient to provide the composition with a viscosity so that it can be readily applied to the hair without unduly dripping off the hair and causing mess. Typically, such an amount will be at least 0.1%, preferably at least 0.5%, more preferably, at least 1%, by weight, of the composition.

Preferred for use herein are salt tolerant thickeners, including but not limited to: xanthan, guar, hydroxypropyl guar, scleroglucan, methyl cellulose, ethyl cellulose (available as AQUACOTE (TM)), hydroxyethyl cellulose (NATROSOL (TM)), carboxymethyl cellulose, hydroxypropylmethyl cellulose, microcrystalline cellulose, hydroxybutylmethyl cellulose, hydroxypropyl cellulose (available as KLUCEL (TM)), hydroxyethyl ethyl cellulose, cetyl hydroxyethyl cellulose (available as NATROSOL (TM) Plus 330), N-vinylpyrollidone (available as POVIDONE (TM)), Acrylates/Ceteth-20 Itaconate Copolymer (available as STRUCTURE (TM) 3001), hydroxypropyl starch phosphate (available as STRUCTURE (TM) ZEA), polyethoxylated urethanes or polycarbamyl polyglycol ester (e.g. PEG-150/Decyl/SMDI copolymer (available as ACULYN(TM) 44), PEG-150/Stearyl/SMDI copolymer available as ACULYN(TM) 46), trihydroxystearin (available as THIXCIN(TM)), acrylates copolymer (e.g. available as ACULYN(TM) 33) or hydrophobically modified acrylate copolymers (e.g. Acrylates/Steareth-20 Methacrylate Copolymer (available as ACULYN(TM) 22), non-ionic amphophilic polymers comprising at least one fatty chain and at least one hydrophilic unit selected from polyether urethanes comprising at least one fatty chain, and blends of Ceteth—10 phosphate, Di-cetyl phosphate and Cetearyl alcohol (available as CRODAFOS(TM) CES).

G. Chelants

The inventive compositions may comprise chelants in an amount sufficient to reduce the amount of metals available to interact with formulation components, particularly oxidizing agents, more particularly peroxides. Typically such an amount will range from at least 0.25%, preferably at least 0.5%, by weight, of the composition. Suitable chelants for use herein include but are not limited to: diamine-N,N′-dipolyacid, monoamine monoamide-N,N′-dipolyacid, and N,N′-bis(2-hydroxybenzyl)ethylenediamine-N,N′-diacetic acid chelants (preferably EDDS (ethylenediaminedisuccinic acid)), carboxylic acids (preferably aminocarboxylic acids), phosphonic acids (preferably aminophosphonic acids) and polyphosphoric acids (in particular straight polyphosphoric acids), their salts and derivatives.

H. pH Modifiers and Buffering Agents

The inventive compositions may further comprise a pH modifier and/or buffering agent in an amount that is sufficiently effective to adjust the pH of the composition to fall within a range from 3 to 13, preferably from 8 to 12, more preferably from 9 to 11. Suitable pH modifiers and/or buffering agents for use herein include, but are not limited to: ammonia, alkanolamides such as monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, tripropanolamine, 2-amino-2-methyl-1-propanol, and 2-amino-2-hydroxymethyl-1,3,-propandiol and guanidium salts, alkali metal and ammonium hydroxides and carbonates, preferably sodium hydroxide and ammonium carbonate, and acidulents such as inorganic and inorganic acids, e.g., phosphoric acid, acetic acid, ascorbic acid, citric acid or tartaric acid, hydrochloric acid, and mixtures thereof.

I. Carbonate Ion Source and Radical Scavenger System

The inventive compositions may comprise a system comprising a source of carbonate ions, carbamate ions and or hydrocarbonate ions, and a radical scavenger, in a sufficient amount to reduce damage to the hair during the coloring process. Typically, such an amount will range from 0.1% to 15%, preferably 0.1% to 10%, more preferably 1% to 7%, by weight of the composition, of the carbonate ion, and from 0.1% to 10%, preferably from 1% to 7%, by weight of the composition, of radical scavenger. Preferably, the radical scavenger is present at an amount such that the ratio of radical scavenger to carbonate ion is from 1:1 to 1:4. The radical scavenger is preferably selected such that it is not an identical species as the alkalizing agent.

Suitable sources for the ions include but are not limited to: sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, guanidine carbonate, guanidine hydrogen carbonate, lithium carbonate, calcium carbonate, magnesium carbonate, barium carbonate, ammonium carbonate, ammonium hydrogen carbonate and mixtures thereof. Preferred sources of carbonate ions are sodium hydrogen carbonate and potassium hydrogen carbonate. Also preferred are ammonium carbonate, and ammonium hydrogen carbonate.

The radical scavenger is a species that can react with a carbonate radical to convert the carbonate radical by a series of fast reactions to a less reactive species. Preferably, when the radical scavenger comprises an N atom, it has a pKa>7 to prevent the protonation of the nitrogen. Preferred radical scavengers may be selected from the classes of alkanolamines, amino sugars, amino acids and mixtures thereof, and may include, but are not limited to: monoethanolamine, 3-amino-1-propanol, 4-amino-1-butanol, 5-amino-1-pentanol, 1-amino-2-propanol, 1-amino-2-butanol, 1-amino-2-pentanol, 1-amino-3-pentanol, 1-amino-4-pentanol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropane-1,2-diol, glucosamine, N-acetylglucosamine, glycine, arginine, lysine, proline, glutamine, histidine, serine, tryptophan and potassium, sodium and ammonium salts of the above and mixtures thereof. Other preferred radical scavenger compounds include benzylamine, glutamic acid, imidazole, di-tert-butylhydroxytoluene, hydroquinone, catechol and mixtures thereof.

Methods of Manufacture

The compounds of this invention may be obtained using conventional methods. A general description of how to make the compounds is provided above and specific examples are provided below. The compositions of this invention may also be obtained using conventional methods. The keratin dyeing compositions may be formed as solutions, preferably as aqueous or aqueous-alcohol solutions. The hair dye product compositions may preferably be formed as thick liquids, creams, gels, or emulsions whose composition is a mixture of the dye compound and other dye ingredients with conventional cosmetic additive ingredients suitable for the particular preparation.

Methods of Use

The inventive keratin dyeing compositions may be used by admixing them with a suitable oxidant, which reacts with the oxidative dye precursors to develop the hair dye product composition. The oxidant is usually provided in an aqueous composition, which normally is provided as a separate component of the finished keratin dyeing product system and present in a separate container. Upon mixing the keratin dyeing composition, the adjuvants are provided in the hair dye composition as it is applied to the hair to achieve desired product attributes, e.g., pH, viscosity, rheology, etc.

The keratin dyeing composition, as it is applied to the hair, can be weakly acidic, neutral or alkaline according to their composition, typically having a pH from 6 to 11, preferably from 7 to 10, more preferably from 8 to 10. The pH of the developer composition is typically acidic, and generally the pH is from 2.5 to 6.5, preferably from 3 to 5. The pH of the hair compositions may be adjusted using a pH modifier as mentioned above.

In order to use the keratin dyeing composition, the above-described compositions are mixed immediately prior to use and a sufficient amount of the mixture is applied to the hair, according to the hair abundance, generally from 60 to 200 grams. Upon such preparation the hair dye composition is applied to the hair to be dyed and remains in contact with the hair for an amount of time effective to dye the hair. Typically, the hair dye composition is allowed to act on the hair for 2 to 60, preferably 15 to 45, more preferably, 30 minutes, at a temperature ranging from 15° to 50° C. Thereafter, the hair is rinsed with water, to remove the hair dye composition and dried. If necessary, the hair is washed with a shampoo and rinsed, e.g., with water or a weakly acidic solution, such as a citric acid or tartaric acid solution, and dried. Optionally, a separate conditioning product may also be provided.

Together, components of the keratin dyeing composition form a system for dyeing hair. This system may be provided as a kit comprising in a single package separate containers of the keratin dyeing composition components or other hair treatment product, and instructions for use.

EXAMPLES

The following are non-limiting examples of the compositions of the present invention. The examples are given solely for the purpose of illustration and are not to be construed as limitations of the present invention, as many variations thereof are possible without departing from the spirit and scope of the invention, which would be recognized by one of ordinary skill in the art. In the examples, all concentrations are listed as weight percent, unless otherwise specified. As used herein, “minors” refers to those optional components such as preservatives, viscosity modifiers, pH modifiers, fragrances, foam boosters, and the like. As is apparent to one of ordinary skill in the art, the selection of these minors will vary depending on the physical and chemical characteristics of the particular ingredients selected to make the present invention as described herein.

The following compositions can be used for dyeing hair. Mix the dyeing composition with an equal weight of a 20-volume hydrogen peroxide solution (6% by weight). Apply the resulting mixture to the hair and permit it to remain in contact with the hair for 30 minutes. Shampoo dyed hair and rinse with water and dry.

Common base (CB) for dyeing Ingredients Weight (g) Propylene glycol 9.5 Ammonium hydroxide 5 Ethoxydiglycol 4 Ethanolamine 4.5 Oleic acid 1 Hexylene glycol 6 Cocamidopropyl betaine 3.5 Oleth-10 0.3 Oleth-2 0.3 Dilinoleic acid 1.5 C12–C15 Pareth-3 0.5 Soytrimonium chloride 7 Sodium metasilicate 0.05 Erythorbic acid 0.5 EDTA 0.03 Sodium sulfite 0.3 1-Phenyl-3-methyl-5-pyrazolone 0.2 Ingredients 1 2 3 4 5 6 7 Imidazo[2,1-b][1,3]thiazole-5,6- 0.05 0.04 0.03 0.01 0.05 0.15 0.2 diamine N,N-Bis(2-hydroxyetyl)-p- 0.1 0.02 phenylendiamine 4-Aminophenol 0.2 0.02 0.3 0.2 0.4 4-Amino-2-methylphenol 0.4 0.2 3-Aminophenol 0.1 5-Amino-2-methylphenol 0.02 0.02 0.02 0.04 1-Naphthol 0.05 Resorcinol 0.15 0.1 0.1 0.4 0.1 0.5 0.4 2-Methylresorcinol 0.4 1-Hydroxyethyl-4,5-diaminopyrazole 0.2 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 8 9 10 11 12 13 14 5-aminoimidazo[2,1-b][1,3]thiazol-6- 0.3 0.2 0.2 0.1 0.1 0.2 0.6 ol N,N-Bis(2-hydroxyetyl)-p- 0.33 0.02 phenylendiamine 4-Aminophenol 0.5 0.7 0.9 1.2 0.3 4-Amino-2-methylphenol 1 1.2 3-Aminophenol 0.3 5-Amino-2-methylphenol 0.4 0.4 2.5 2.5 1 0.8 1-Naphthol Resorcinol 0.3 0.1 0.1 0.1 0.1 0.6 0.1 2-Methylresorcinol 0.4 0.6 0.6 1-Hydroxyethyl-4,5-diaminopyrazole 0.2 0.2 0.4 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 15 16 17 18 19 20 21 Imidazo[5,1-b][1,3]oxazol-7-amine 1 0.1 0.5 0.5 0.1 0.1 0.5 N,N-Bis(2-hydroxyetyl)-p- 0.1 phenylendiamine 4-Aminophenol 0.4 0.8 0.1 4-Amino-2-methylphenol 0.6 0.8 3-Aminophenol 1.5 1 0.1 5-Amino-2-methylphenol 1.4 0.5 0.1 0.1 1-Naphthol 0.1 0.1 0.1 Resorcinol 0.5 0.2 0.2 0.5 2-Methylresorcinol 0.5 0.8 0.1 1-Hydroxyethyl-4,5-diaminopyrazole 0.6 2 1.5 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 22 23 24 25 26 27 28 Pyrrolo[2,1-b][1,3]thiazole-3,6- 0.3 0.5 0.4 0.3 diamine Imidazo[2,1-b][1,3]thiazol-6-amine 0.5 0.4 0.3 N,N-Bis(2-hydroxyetyl)-p- 0.1 0.1 0.3 0.1 0.3 phenylendiamine p-Phenylenediamine 0.4 0.4 4-Aminophenol 0.5 0.1 0.2 0.1 0.2 4-Amino-2-methylphenol 1 1 3-Aminophenol 0.3 0.2 0.2 5-Amino-2-methylphenol 0.4 0.2 0.5 0.4 0.2 0.5 1-Naphthol 0.1 0.1 Resorcinol 0.3 0.2 0.4 0.3 0.2 0.4 0.3 2-Methylresorcinol 0.4 0.2 0.2 1-Hydroxyethyl-4,5-diaminopyrazole 0.5 0.1 0.3 0.5 0.1 0.3 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 29 30 31 32 33 34 35 Imidazo[2,1-b][1,3,4] thiadiazol-6- 0.3 0.5 0.4 0.3 amine 2,3,6-trimethylpyrrolo [2,1-b]thiazol- 0.5 0.4 0.3 5-ol N,N-Bis(2-hydroxyetyl)-p- 0.1 0.1 0.3 0.1 0.3 phenylendiamine p-Phenylenediamine 0.4 0.4 4-Aminophenol 0.5 0.1 0.2 0.1 0.2 4-Amino-2-methylphenol 1 1 3-Aminophenol 0.3 0.2 0.2 5-Amino-2-methylphenol 0.4 0.2 0.5 0.4 0.2 0.5 1-Naphthol 0.1 0.1 Resorcinol 0.3 0.2 0.4 0.3 0.2 0.4 0.3 2-Methylresorcinol 0.4 0.2 0.2 1-Hydroxyethyl-4,5-diaminopyrazole 0.5 0.1 0.3 0.5 0.1 0.3 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 36 37 38 39 40 41 42 Pyrrolo[2,1-b]thiazole-7-amine 0.05 0.04 0.03 0.01 0.05 0.15 0.2 N,N-Bis(2-hydroxyetyl)-p- 0.1 0.02 phenylendiamine 4-Aminophenol 0.2 0.02 0.3 0.2 0.4 4-Amino-2-methylphenol 0.4 0.2 3-Aminophenol 0.1 5-Amino-2-methylphenol 0.02 0.02 0.02 0.04 1-Naphthol 0.05 Resorcinol 0.15 0.1 0.1 0.4 0.1 0.5 0.4 2-Methylresorcinol 0.4 1-Hydroxyethyl-4,5-diaminopyrazole 0.2 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 43 44 45 46 47 48 49 Pyrazolo[5,1-b]thiazole-7-amine 0.3 0.2 0.2 0.1 0.1 0.2 0.6 N,N-Bis(2-hydroxyetyl)-p- 0.33 0.02 phenylendiamine 4-Aminophenol 0.5 0.7 0.9 1.2 0.3 4-Amino-2-methylphenol 1 1.2 3-Aminophenol 0.3 5-Amino-2-methylphenol 0.4 0.4 2.5 2.5 1 0.8 1-Naphthol Resorcinol 0.3 0.1 0.1 0.1 0.1 0.6 0.1 2-Methylresorcinol 0.4 0.6 0.6 1-Hydroxyethyl-4,5-diaminopyrazole 0.2 0.2 0.4 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs Ingredients 50 51 52 53 54 55 56 Imidazo[5,1-b]thiazole-7-amine 1 0.1 0.5 0.5 0.1 0.1 0.5 N,N-Bis(2-hydroxyetyl)-p- 0.1 phenylendiamine 4-Aminophenol 0.4 0.8 0.1 4-Amino-2-methylphenol 0.6 0.8 3-Aminophenol 1.5 1 0.1 5-Amino-2-methylphenol 1.4 0.5 0.1 0.1 1-Naphthol 0.1 0.1 0.1 Resorcinol 0.5 0.2 0.2 0.5 2-Methylresorcinol 0.5 0.8 0.1 1-Hydroxyethyl-4,5-diaminopyrazole 0.6 2 1.5 Common base (CB) 44.18 44.18 44.18 44.18 44.18 44.18 44.18 Water qs qs qs qs qs qs qs

While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

All documents cited in the Background, Summary of the Invention, and Detailed Description of the Invention are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention. 

1. A keratin dyeing composition comprising: (A) a medium suitable for dyeing; and (B) one or more bicyclic 5-5 heteroaromatic compounds having a ring junction nitrogen according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein R¹, R², R⁴, R⁵, and R⁶ are the same or different and are selected from the group consisting of: (a) C-linked monovalent substituents selected from the group consisting of: (i) substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems, (ii) substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems, and (iii) substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems; wherein said systems of (i), (ii) and (iii) comprise from about 1 to about 10 carbon atoms and from about 0 to about 5 heteroatoms selected from the group consisting of O, S, N, P, and Si; (b) S-linked monovalent substituents selected from the group consisting of SA¹, SO₂A¹, SO₃A¹, SSA¹, SOA¹, SO₂NA¹A², SNA¹A², and SONA¹A²; (c) O-linked monovalent substituents selected from the group consisting of OA¹, and ONA¹A²; (d) N-linked monovalent substituents selected from the group consisting of NA¹A², (NA¹A²A³)⁺, NA¹OA², NA¹SA², NO₂, N═NA¹, N═NOA¹, NA¹CN, and NA¹NA²A³; (e) monovalent substituents selected from the group consisting of COOA¹, CONA¹ ₂, CONA¹COA², C(═NA¹)NA¹A², CN, and X; (f) fluoroalkyl monovalent substituents selected from the group consisting of mono-, poly-, and per-fluoro alkyl systems comprising from about 1 to about 12 carbon atoms and from about 0 to about 4 heteroatoms; and (g) hydrogen wherein A¹, A², and A³ are monovalent and are each independently selected from the group consisting of H; substituted or unsubstituted, straight or branched, alkyl, mono- or poly-unsaturated alkyl, heteroalkyl, aliphatic, heteroaliphatic, or heteroolefinic systems; substituted or unsubstituted, mono- or poly-cyclic aliphatic, aryl, or heterocyclic systems; and substituted or unsubstituted, mono-, poly-, or per-fluoro alkyl systems, or A¹ and A² together with nitrogen atom to which they are bound form a ring; wherein said systems comprise from about 1 to about 10 carbon atoms and from about 0 to about 5 heteroatoms selected from the group consisting of O, S, N, P, and Si; and wherein X is a halogen selected from the group consisting of F, Cl, Br, and I.
 2. The composition of claim 1 wherein said R¹, R², R⁴, R⁵, and R⁶ are each independently selected from the group consisting of a hydrogen atom; a halogen atom; an amino substituent; a hydroxyl substituent; a cyano substituent; a C₁–C₄ alkyl substituent; a trifluoromethyl substituent; an alkylamino substituent; a hydroxyalkylamino substituent; an acetylamido substituent; a carboxyl substituent or its esters; an alkoxy substituent; an alkoxyalkyl substituent; a carbamoyl substituent; an alkylcarbamoyl substituent; a hydroxyalkylcarbamoyl substituent; an amido substituent; an alkylamido substituent; an alkylcarbonyl substituent; an alkoxycarbonyl substituent; an aryloxy substituent; an acyloxy substituent; an alkylthio substituent; an arylthio substituent; a heteroarylthio substituent; a heteroaryloxy substituent; a thiocyano substituent; a 3-, 4-, 5-, 6-, or 7-membered heterocycle having at least one nitrogen, oxygen or sulfur atom; an aryl substituent which is optionally substituted; a sulfonyl substituent; a sulfinyl substituent; a phosphonyl substituent; a sulfamoyl substituent; a siloxy substituent; an acyloxy substituent; a carbamoyloxy substituent; a sulphonamide substituent; an imide substituent; a ureido substituent; a sulfamoylamino substituent; an alkoxycarbonylamino substituent; an aryloxycarbonylamino substituent; an aryloxycarbonyl substituent; and a benzenesulfonamido substituent.
 3. The composition of claim 1 wherein at least one of said R¹, R⁴ or R⁶ is an amino group, with at least one of the remaining R¹, R², R⁴, R⁵, and R⁶ being selected from substituents being selected from the group consisting of Amino, hydroxyl, a 3-, 4-, 5-, 6-, or 7-membered heterocycle having at least one nitrogen, oxygen or sulfur atom, Alkylamino (linear, branched, or cyclic C1–C5), Dialkylamino (linear, branched, or cyclic C1–C5), Hydroxyalkylamino (linear, branched, or cyclic C1–C5), Dihydroxyalkylamino (linear, branched, or cyclic C1–C5), Arylamino or substituted arylamino; Heteroarylamino or substituted heteroarylamino; Arylmethylamino or substituted arylmethylamino; and Heteroarylmethylamino or substituted heteroarylmethylamino, wherein substituents are selected from the group consisting of halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, and C1–C5 alkylamino.
 4. The composition of claim 1 wherein at least one of said R¹, R², R⁴, R⁵, and R⁶ is selected from substituents selected from the group consisting of Amino, Hydroxyl, Alkylamino (linear, branched, or cyclic C1–C5), Hydroxyalkylamino (linear, branched, or cyclic C1–C5), Arylamino or substituted arylamino; Heteroarylamino or substituted heteroarylamino; Arylmethylamino or substituted arylmethylamino; and Heteroarylmethylamino or substituted heteroarylmethylamino, wherein substituents are selected from the group consisting of halogen, C1–C5 alkyl, C1–C5 alkoxy, trifluoromethyl, amino, and C1–C5 alkylamino.
 5. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D² and D⁵ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E¹, E², E⁴, E⁵ and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 6. The composition of claim 5 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of pyrrolo[2,1-b]thiazole-5,6-diamine, 5-aminopyrrolo[2,1-b]thiazol-6-ol, pyrrolo[2,1-b]thiazol-7-amine, pyrrolo[2,1-b]thiazole-2,3-diamine, pyrrolo[2,1-b]thiazol-5-amine, 3-aminopyrrolo[2,1-b]thiazol-2-ol, pyrrolo[2,1-b]oxazole-5,6-diamine, 5-aminopyrrolo[2,1-b]oxazol-6-ol, pyrrolo[2,1-b]oxazol-7-amine, pyrrolo[2,1-b]oxazole-2,3-diamine, pyrrolo[2,1-b]oxazol-5-amine, 3-aminopyrrolo[2,1-b]oxazol-2-ol, pyrrolo[2,1-b]thiazol-6-amine, pyrrolo[2,1-b]thiazol-6-ol, 6-methylpyrrolo[2,1-b]thiazole, pyrrolo[2,1-b]thiazole-3,6-diamine, pyrrolo[2,1-b]thiazole-6,7-diamine, pyrrolo[2,1-b]thiazol-2-amine, pyrrolo[2,1-b]thiazol-2-ol, pyrrolo[2,1-b]oxazol-6-amine, pyrrolo[2,1-b]oxazol-6-ol, 6-methylpyrrolo[2,1-b]oxazole, pyrrolo[2,1-b]oxazole-3,6-diamine, pyrrolo[2,1-b]oxazole-6,7-diamine, pyrrolo[2,1-b]oxazol-2-amine, and pyrrolo[2,1-b]oxazol-2-ol.
 7. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D² is selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E¹, E², E⁴, and E⁵ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 8. The composition of claim 7 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of pyrazolo[5,1-b]thiazol-7-amine, 6-methyl-pyrazolo[5,1-b]thiazole-7-amine, pyrazolo[5,1-b]thiazole-6,7-diamine, 7-aminopyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-2,3-diamine, 3-aminopyrazolo[5,1-b]thiazol-2-ol, pyrazolo[5,1-b]oxazol-7-amine, pyrazolo[5,1-b]oxazole-6,7-diamine, 7-aminopyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-2,3-diamine, 3-aminopyrazolo[5,1-b]oxazol-2-ol, pyrazolo[5,1-b]thiazol-6-amine, pyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-3,6-diamine, pyrazolo[5,1-b]thiazole-6,7-diamine, pyrazolo[5,1-b]thiazol-2-amine, pyrazolo[5,1-b]thiazol-2-ol, pyrazolo[5,1-b]oxazol-6-amine, pyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-3,6-diamine, pyrazolo[5,1-b]oxazole-6,7-diamine, pyrazolo[5,1-b]oxazol-2-amine, and pyrazolo[5,1-b]oxazol-2-ol.
 9. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D² is selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E¹, E², E⁴, and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 10. The composition of claim 9 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of imidazo[5,1-b]thiazole-7-amine, imidazo[5,1-b]thiazole-5,7-diamine, imidazo[5,1-b]thiazole-3,5,7-triamine, 5-aminoimidazo[5,1-b]thiazole-7-ol, imidazo[5,1-b]thiazole-7-amine, imidazo[5,1-b]thiazole-2,3-diamine, imidazo[5,1-b]thiazole-5-amine, 3-aminoimidazo[5,1-b]thiazole-2-ol, imidazo[5,1-b]oxazole-5,7-diamine, 5-aminoimidazo[5,1-b]oxazole-7-ol, imidazo[5,1-b]oxazole-7-amine, 2-methyl-imidazo[5,1-b]oxazole-7-amine, imidazo[5,1-b]oxazole-2,3-diamine, imidazo[5,1-b]oxazole-5-amine, 3-aminoimidazo[5,1-b]oxazole-2-ol, imidazo[5,1-b]thiazole-3,7-diamine, imidazo[5,1-b]thiazole-3,7-diol, imidazo[5,1-b]thiazole-3,5-diamine, imidazo[5,1-b]thiazole-2,7-diamine, imidazo[5,1-b]thiazole-2-amine, imidazo[5,1-b]thiazole-2-ol, imidazo[5,1-b]oxazole-3,7-diamine, imidazo[5,1-b]oxazole-3,7-diol, imidazo[5,1-b]oxazole-3,5-diamine, imidazo[5,1-b]oxazole-2,7-diamine, imidazo[5,1-b]oxazole-2-amine, and imidazo[5,1-b]oxazole-2-ol.
 11. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D² and D⁵ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E¹, E², E⁵, and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 12. The composition of claim 11 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of imidazo[2,1-b]thiazole-5-amine, imidazo[2,1-b]thiazole-5,6-diamine, 5-amino imidazo[2,1-b]thiazole-6-ol, imidazo[2,1-b]thiazole-2,3-diamine, 3-amino imidazo[2,1-b]thiazole-2-ol, imidazo[2,1-b]oxazole-5-amine, imidazo[2,1-b]oxazole-5,6-diamine, 5-amino imidazo[2,1-b]oxazole-6-ol, imidazo[2,1-b]oxazole-2,3-diamine, 3-amino imidazo[2,1-b]oxazole-2-ol, imidazo[2,1-b]thiazole-6-amine, imidazo[2,1-b]thiazole-6-ol, imidazo[2,1-b]thiazole-3,6-diamine, imidazo[2,1-b]thiazole-5,6-diamine, imidazo[2,1-b]thiazole-2-amine, imidazo[2,1-b]thiazole-2-ol, imidazo[2,1-b]oxazole-6-amine, imidazo[2,1-b]oxazole-6-ol, imidazo[2,1-b]oxazole-3,6-diamine, imidazo[2,1-b]oxazole-5,6-diamine, imidazo[2,1-b]oxazole-2-amine, and imidazo[2,1-b]oxazole-2-ol.
 13. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D⁵ is selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E², E⁴, E⁵, and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 14. The composition of claim 13 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of pyrrolo[2,1-b][1,3,4]thiadiazole-7-amine, pyrrolo[2,1-b][1,3,4]thiadiazole-5-amine, pyrrolo[2,1-b][1,3,4]thiadiazole-5,6-diamine, 5-aminopyrrolo[2,1-b][1,3,4]thiadiazole-6-ol, pyrrolo[2,1-b][1,3,4]thiadiazole-6,7-diamine, 5-aminopyrrolo[2,1-b][1,3,4]thiadiazole-2-ol, pyrrolo[2,1-b][1,3,4]oxadiazole-7-amine, pyrrolo[2,1-b][1,3,4]oxadiazole-5-amine, pyrrolo[2,1-b][1,3,4]oxadiazole-5,6-diamine, 5-aminopyrrolo[2,1-b][1,3,4]oxadiazole-6-ol, pyrrolo[2,1-b][1,3,4]oxadiazole-6,7-diamine, 5-aminopyrrolo[2,1-b][1,3,4]oxadiazole-2-ol, pyrazolo[5,1-b]thiazol-6-amine, pyrazolo[5,1-b]thiazol-6-ol, pyrazolo[5,1-b]thiazole-2,6-diamine, pyrazolo[5,1-b]thiazole-2,6-diol, pyrazolo[5,1-b]thiazol-2,7-diol, pyrazolo[5,1-b]oxazol-6-amine, pyrazolo[5,1-b]oxazol-6-ol, pyrazolo[5,1-b]oxazole-2,6-diamine, pyrazolo[5,1-b]oxazole-2,6-diol, and pyrazolo[5,1-b]oxazol-2,7-diol.
 15. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen are selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; wherein D⁵ is selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl; and wherein E¹, E⁴, E⁵, and E⁶ are each independently selected from the group consisting of hydrogen, chlorine, bromine, fluorine, amino, hydroxyl, cyano, methyl, ethyl, isopropyl, trifluoromethyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino), carboxyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxymethyl, methoxyethyl, methoxypropyl, ethoxymethyl, ethoxyethyl, ethoxypropyl, amido, acetamido, propionamido, butyramido, acetyl, butyryl, propionyl, phenoxy, methylthio, ethylthio, propylthio, butylthio, pyridyl, quinolyl, morpholyl, furyl, tetrahydrofuryl, pyrazolyl, triazolyl, tetrazolyl, triazolyl, oxazolyl, imidazolyl, thiadiazolyl, phenyl, sulfonyl, sulphonamido, and ureido.
 16. The composition of claim 15 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of pyrrolo[1,2-d][1,2,4]thiadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-3,5,6-triamine, 5-aminopyrrolo[1,2-d][1,2,4]thiadiazole-6-ol, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diamine, 5-pyrrolo[1,2-d][1,2,4]thiadiazole-5-amine, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diamine, 5-aminopyrrolo[1,2-d][1,2,4]thiadiazole-7-ol, pyrrolo[1,2-d][1,2,4]thiadiazole-3,6,7-triol, pyrrolo[1,2-d][1,2,4]oxadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-3,5,6-triamine, 5-aminopyrrolo[1,2-d][1,2,4]oxadiazole-6-ol, pyrrolo[1,2-d][1,2,4]oxadiazole-7-amine, pyrrolo[1,2-d][1,2,4]oxadiazole-5-amine, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diamine, 5-aminopyrrolo[1,2-d][1,2,4]oxadiazole-7-ol, pyrrolo[1,2-d][1,2,4]oxadiazole-3,6,7-triol, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-6,7-diol, pyrrolo[1,2-d][1,2,4]thiadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]thiadiazole-6-amine, pyrrolo[1,2-d][1,2,4]thiadiazole-6-ol, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-6,7-diol, pyrrolo[1,2-d][1,2,4]oxadiazole-5,6-diamine, pyrrolo[1,2-d][1,2,4]oxadiazole-6-amine, and pyrrolo[1,2-d][1,2,4]oxadiazole-6-ol, 2-ol.
 17. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D¹, D², and D⁴ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 18. The composition of claim 17 wherein bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of thiazolo[3,2-e][1,2,3]triazole-7-amine, thiazolo[3,2-e][1,2,3]triazole-2,3,7-triamine, 7-aminothiazolo[3,2-e][1,2,3]triazole-2,3-diol, 3,7-diaminothiazolo[3,2-e][1,2,3]traizole-2-ol, 2,3-diaminothiazolo[3,2-e][1,2,3]triazole-7-ol, 3,7-triaminothiazolo[3,2-e][1,2,3]triazole-2-ol, oxazolo[3,2-e][1,2,3]triazole-7-amine, oxazolo[3,2-e][1,2,3]triazole-2,3,7-triamine, 7-aminooxazolo[3,2-e][1,2,3]triazole-2,3-diol, 3,7-diaminooxazolo[3,2-e][1,2,3]triazole-2-ol, 2,3-diaminooxazolo[3,2-e][1,2,3]triazole-7-ol, 3,7-triaminooxazolo[3,2-e][1,2,3]triazole-2-ol, thiazolo[3,2-e][1,2,3]triazole-2,3-diamine, thiazolo[3,2-e][1,2,3]triazole-2,3-diol, thiazolo[3,2-e][1,2,3]triazole-2,7-diamine, 2-aminothiazolo[3,2-e][1,2,3]triazole-7-ol, 7-aminothiazolo[3,2-e][1,2,3]triazole-2-ol, oxazolo[3,2-e][1,2,3]triazole-2,3-diamine, oxazolo[3,2-e][1,2,3]triazole-2,3-diol, oxazolo[3,2-e][1,2,3]triazole-2,7-diamine, 2-aminooxazolo[3,2-e][1,2,3]triazole-7-ol, and 7-aminooxazolo[3,2-e][1,2,3]triazole-2-ol.
 19. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D² and D⁵ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamnino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 20. The composition of claim 19 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of thiazolo[3,2-b][1,2,4]triazole-2,3,6-triamine, 3-aminothiazolo[3,2-b][1,2,4]triazole-2,6-diol, diaminothiazolo[3,2-b][1,2,4]triazole-6-ol, oxazolo[3,2-b][1,2,4]triazole-2,3,6-triamine, 3-aminooxazolo[3,2-b][1,2,4]triazole-2,6-diol, 2,3-diaminooxazolo[3,2-b][1,2,4]-triazole-6-ol, of thiazolo[3,2-b][1,2,4]triazole-2,6-diamine, thiazolo[3,2-b][1,2,4]triazole-2,6-diol, 2-aminothiazolo[3,2-b][1,2,4]triazole-6-ol, 6-aminothiazolo[3,2-b][1,2,4]triazole-2-ol, oxazolo[3,2-b][1,2,4]triazole-2,6-diamine, oxazolo[3,2-b][1,2,4]triazole-2,6-diol, 2-aminooxazolo[3,2-b][1,2,4]triazole-6-ol, and 6-aminooxazolo[3,2-b][1,2,4]triazole-2-ol.
 21. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D¹, D², and D⁶ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 22. The composition of claim 21 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of thiazolo[2,3-c][1,2,4]triazole-5-amine, thiazolo[2,3-c][1,2,4]triazole-2,3,5-triamine, 3-aminothiazolo[2,3-c][1,2,4]triazole-2,5-diol, 2,5-diaminothiazolo[2,3-c][1,2,4]triazole-3-ol, 5-aminothiazolo[2,3-c][1,2,4]triazole-2,3-diol, 3,5-diaminothiazolo[2,3-c][1,2,4]triazole-2-ol, oxazolo[2,3-c][1,2,4]triazole-5-amine, oxazolo[2,3-c][1,2,4]triazole-2,3,5-triamine, 3-aminooxazolo[2,3-c][1,2,4]triazole-2,5-diol, 2,5-diaminooxazolo[2,3-c][1,2,4]triazole-3-ol, 5-aminooxazolo[2,3-c][1,2,4]triazole-2,3-diol, 3,5-diaminooxazolo[2,3-c][1,2,4]triazole-2-ol, thiazolo[2,3-c][1,2,4]triazole-2,3-diamine, thiazolo[2,3-c][1,2,4]triazole-2,3-diol, thiazolo[2,3-c][1,2,4]triazole-2,5-diol, thiazolo[2,3-c][1,2,4]triazole-2,5-diamine, oxazolo[2,3-c][1,2,4]triazole-2,3-diamine, oxazolo[2,3-c][1,2,4]triazole-2,3-diol, oxazolo[2,3-c][1,2,4]triazole-2,5-diol, and oxazolo[2,3-c][1,2,4]triazole-2,5-diamine.
 23. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D² and D⁵ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 24. The composition of claim 23 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of pyrazolo[5,1-b][1,3,4]thiadiazole-7-amine, pyrazolo[5,1-b][1,3,4]thiadiazole-2,6,7-triamine, 7-aminopyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diol, 6,7-diaminopyrazolo[5,1-b][1,3,4]thiadiazole-2-ol, 2,7-diaminopyrazolo[5,1-b][1,3,4]thiadiazole-6-ol, pyrazolo[5,1-b][1,3,4]oxadiazole-7-amine, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6,7-triamine, 7-aminopyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diol, 6,7-diaminopyrazolo[5,1-b][1,3,4]oxadiazole-2-ol, 2,7-diaminopyrazolo[5,1-b][1,3,4]oxadiazole-6-ol, pyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diamine, pyrazolo[5,1-b][1,3,4]thiadiazole-2,6-diol, 2-aminopyrazolo[5,1-b][1,3,4]thiadiazole-6-ol, 6-aminopyrazolo[5,1-b][1,3,4]thiadiazole-2-ol, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diamine, pyrazolo[5,1-b][1,3,4]oxadiazole-2,6-diol, 2-aminopyrazolo[5,1-b][1,3,4]oxadiazole-6-ol, and 6-aminopyrazolo[5,1-b][1,3,4]oxadiazole-2-ol.
 25. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D², D⁴, and D⁶ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 26. The composition of claim 25 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of imidazo[5,1-b][1,3,4]thiadiazole-7-amine, imidazo[5,1-b][1,3,4]thiadiazole-2,5,7-triamine, 7-aminoimidazo[5,1-b][1,3,4]thiadiazole-2,5-diol, 2,7-diaminoimidazo[5,1-b][1,3,4]thiadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]thiadiazole-2,7-diol, 2,5-diaminoimidazo[5,1-b][1,3,4]thiadiazole-7-ol, imidazo[5,1-b][1,3,4]oxadiazole-7-amine, imidazo[5,1-b][1,3,4]oxadiazole-2,5,7-triamine, 7-aminoimidazo[5,1-b][1,3,4]oxadiazole-2,5-diol, 2,7-diaminoimidazo[5,1-b][1,3,4]oxadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]oxadiazole-2,7-diol, 2,5-diaminoimidazo[5,1-b][1,3,4]oxadiazole-7-ol, imidazo[5,1-b][1,3,4]thiadiazole-2,5-diamine, imidazo[5,1-b][1,3,4]thiadiazole-2,5-diol, 2-aminoimidazo[5,1-b][1,3,4]thiadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]thiadiazole-2-ol, imidazo[5,1-b][1,3,4]thiadiazole-2,7-diamine, imidazo[5,1-b][1,3,4]thiadiazole-2,7-diol, 2-aminoimidazo[5,1-b][1,3,4]thiadiazole-7-ol, 7-aminoimidazo[5,1-b][1,3,4]thiadiazole-2-ol, imidazo[5,1-b][1,3,4]oxadiazole-2,5-diamine, imidazo[5,1-b][1,3,4]oxadiazole-2,5-diol, 2-aminoimidazo[5,1-b][1,3,4]oxadiazole-5-ol, 5-aminoimidazo[5,1-b][1,3,4]oxadiazole-2-ol, imidazo[5,1-b][1,3,4]oxadiazole-2,7-diamine, imidazo[5,1-b][1,3,4]oxadiazole-2,7-diol, 2-aminoimidazo[5,1-b][1,3,4]oxadiazole-7-ol, and 7-aminoimidazo[5,1-b][1,3,4]oxadiazole-2-ol.
 27. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of compounds according to the following formulas:

wherein Y is selected from the group consisting of S and O; and wherein D² and D⁶ are each independently selected from the group consisting of amino, hydroxyl, N,N-dimethylamino, N,N-diethylamino, N-methylamino, N-ethylamino, N-(hydroxyethyl)amino, N-hydroxymethylamino, N-hydroxypropylamino, N,N-bis(hydroxyethyl)amino, N-(2,3-dihydroxypropyl)amino, N,N-bis(hydroxypropyl)amino, N-phenyl, N-benzyl, methoxy, ethoxy, propyloxy, benzyloxy, methoxyethoxy, phenoxyethoxy, phenoxy, methylthio, ethylthio, propylthio, furyl, pyrazolyl, triazolyl, oxazolyl, imidazolyl and thiadiazolyl.
 28. The composition of claim 27 wherein said bicyclic 5-5 heteroaromatic compound having a ring junction nitrogen is selected from the group consisting of imidazo[2,1-b][1,3,4]thiadiazole-5-amine, imidazo[2,1-b][1,3,4]thiadiazole-2,5,6-triamine, 5,6-diaminoimidazo[2,1-b][1,3,4]thiadiazole-2-ol, 5-aminoimidazo[2,1-b][1,3,4]thiadiazole-2,6-diol, 2,5-diaminoimidazo[2,1-b][1,3,4]thiadiazole-6-ol, imidazo[2,1-b][1,3,4]oxadiazole-5-amine, imidazo[2,1-b][1,3,4]oxadiazole-2,5,6-triamine, 5,6-diaminoimidazo[2,1-b][1,3,4]oxadiazole-2-ol, 5-aminoimidazo[2,1-b][1,3,4]oxadiazole-2,6-diol, 2,5-diaminoimidazo[2,1-b][1,3,4]oxadiazole-6-ol, imidazo[2,1-b][1,3,4]thiadiazole-2,6-diamine, imidazo[2,1-b][1,3,4]thiadiazole-2,6-diol, 2-aminoimidazo[2,1-b][1,3,4]thiadiazole-6-ol, 6-aminoimidazo[2,1-b][1,3,4]thiadiazole-2-ol, imidazo[2,1-b][1,3,4]oxadiazole-2,6-diamine, imidazo[2,1-b][1,3,4]oxadiazole-2,6-diol, 2-aminoimidazo[2,1-b][1,3,4]oxadiazole-6-ol, and 6-aminoimidazo[2,1-b][1,3,4]oxadiazole-2-ol.
 29. The composition of claim 1 further comprising at least one five-membered ring developer selected from the group consisting of thiophenes, pyrroles, furans, pyrazoles, imidazoles, thiazoles, oxazoles, isothiazoles, and isoxazoles.
 30. The composition of claim 29 wherein said five-membered ring developer is a pyrazole.
 31. The compositions of claim 30 wherein said five-membered ring developer is selected from the group consisting of 1-methyl-1H-pyrazole-4,5-diamine, 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol, 1-isopropyl-1H-pyrazole-4,5-diamine, 1-(4-methylbenzyl)-1H-pyrazole-4,5-diamine, 1-(benzyl)-1H-pyrazole-4,5-diamine, 1-(4-chlorobenzyl)-1H-pyrazole-4,5-diamine, and 1-Hydroxyethyl-4,5-diaminopyrazole sulphate.
 32. The composition of claim 31 wherein said five-membered ring developer is selected from the group consisting of 1-methyl-1H-pyrazole-4,5-diamine; 1-Hydroxyethyl-4,5-diaminopyrazole sulphate; and 2-(4,5-diamino-1H-pyrazol-1-yl)ethanol.
 33. The composition of claim 1 wherein said bicyclic 5-5 heteroaromatic compound with a ring junction nitrogen and incorporating thia or oxa heteroatoms contains a nucleofugic leaving group selected from the group consisting of chlorine, cyano, alkoxy, phenoxy, methylsulfonyoxy, pyridine, and pyridazone.
 34. The composition of claim 1 further comprising auxiliary developers.
 35. The composition of claim 1 further comprising auxiliary couplers.
 36. The composition of claim 1 further comprising direct dyes.
 37. The composition of claim 1 further comprising at least one additional component selected from the group consisting of oxidizing agents, thickeners, chelants, pH modifiers, buffering agents, and carbonate ion source and radical scavenger systems.
 38. A method of dyeing hair comprising the steps of (a) applying to the hair composition of claim 1; and (b) rinsing hair.
 39. A kit comprising (a) the composition of claim 1; (b) an oxidizing agent; and (c) auxiliary couplers and/or auxiliary developers. 